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Can post-breakup Facebook surveillance delay emotional recovery?

Written By empapat on Rabu, 19 September 2012 | 20.25

ScienceDaily (Sep. 19, 2012) — More than 900 million people worldwide are active users of the social networking site Facebook, and it is estimated that as many as one-third report using Facebook to check on the activities of former romantic partners. The effects of remaining Facebook friends with an ex-lover or even just following their activities online can disrupt a person's ability to heal emotionally and move on with his or her life, according to an article in Cyberpsychology, Behavior, and Social Networking.

The study entitled "Facebook Surveillance of Former Romantic Partners: Associations with PostBreakup Recovery and Personal Growth" assessed the effects of continued Facebook contact with an ex-partner and of Facebook surveillance, in which there is no actual online contact, but one individual monitors the Facebook page and postings of another.

The study collected data from 464 participants to evaluate their Facebook usage and their emotional recovery and personal adjustment following the breakup of a romantic relationship. It evaluated parameters such as negative feelings, sexual desire and emotional longing for the ex-partner, and feelings of reduced personal growth as measures of distress and the ability to move forward with their lives.

"This study sees again virtual life mirroring real life. Just as real life contact with ex-partners may inhibit growth, healing, and well-being, so may virtual contact," says Brenda K. Wiederhold, PhD, MBA, BCIA, Editor-in-Chief of Cyberpsychology, Behavior, and Social Networking, from the Interactive Media Institute, San Diego, CA.

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The above story is reprinted from materials provided by Mary Ann Liebert, Inc., Publishers, via AlphaGalileo.

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Journal Reference:

  1. Tara C. Marshall. Facebook Surveillance of Former Romantic Partners: Associations with PostBreakup Recovery and Personal Growth. Cyberpsychology, Behavior, and Social Networking, 2012; : 120904061317006 DOI: 10.1089/cyber.2012.0125

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Clenching left hand could help athletes avoid choking under pressure

ScienceDaily (Sep. 19, 2012) — Some athletes may improve their performance under pressure simply by squeezing a ball or clenching their left hand before competition to activate certain parts of the brain, according to new research published by the American Psychological Association.

In three experiments with experienced soccer players, judo experts and badminton players, researchers in Germany tested the athletes' skills during practice and then in stressful competitions before a large crowd or video camera. Right-handed athletes who squeezed a ball in their left hand before competing were less likely to choke under pressure than right-handed players who squeezed a ball in their right hand. The study was published online in the Journal of Experimental Psychology: General.

For skilled athletes, many movements, such as kicking a soccer ball or completing a judo kick, become automatic with little conscious thought. When athletes under pressure don't perform well, they may be focusing too much on their own movements rather than relying on their motor skills developed through years of practice, said lead researcher Juergen Beckmann, PhD, chair of sport psychology at the Technical University of Munich in Germany.

"Rumination can interfere with concentration and performance of motor tasks. Athletes usually perform better when they trust their bodies rather than thinking too much about their own actions or what their coaches told them during practice," Beckmann said. "While it may seem counterintuitive, consciously trying to keep one's balance is likely to produce imbalance, as was seen in some sub-par performances by gymnasts during the Olympics in London."

Previous research has shown that rumination is associated with the brain's left hemisphere, while the right hemisphere is associated with superior performance in automated behaviors, such as those used by some athletes, the study notes. The right hemisphere controls movements of the left side of the body, and the left hemisphere controls the right side. The researchers theorized that squeezing a ball or clenching the left hand would activate the right hemisphere of the brain and reduce the likelihood of the athlete's choking under pressure. The study focused exclusively on right-handed athletes because some relationships between different parts of the brain aren't as well understood for left-handed people, according to the authors.

The research could have important implications outside athletics. Elderly people who are afraid of falling often focus too much on their movements, so right-handed elderly people may be able to improve their balance by clenching their left hand before walking or climbing stairs, Beckmann said.

"Many movements of the body can be impaired by attempts at consciously controlling them," he said. "This technique can be helpful for many situations and tasks."

In the first experiment, 30 semi-professional male soccer players took six penalty shots during a practice session. The next day, they attempted to make the same penalty shots in an auditorium packed with more than 300 university students waiting to see a televised soccer match between Germany and Austria. The players who squeezed a ball with their left hand performed as well under pressure as during practice, while players who squeezed a ball in their right hand missed more shots in the crowded auditorium.

Twenty judo experts (14 men and six women) took part in the second experiment. First, they performed a series of judo kicks into a sandbag during practice. During a second session, they were told that their kicks would be videotaped and evaluated by their coaches. The judo athletes who squeezed a ball with their left hand not only didn't choke under pressure, they performed better overall during the stressful competition than during practice, while those in the control group choked under pressure, the study found.

The final experiment featured 18 experienced badminton players (12 men and six women) who completed a series of practice serves. Then, they were divided into teams and competed against each other while being videotaped for evaluation by their coaches. Athletes who squeezed a ball in their left hand didn't choke under pressure, unlike the control group players who squeezed a ball in their right hand. A final phase of the experiment had the athletes just clench their left or right hand without a ball before competition, and players who clenched their left hand performed better than players who squeezed their right hand.

The ball-squeezing technique probably wouldn't help athletes whose performance is based on strength or stamina, such as weightlifters or marathon runners, the authors noted. The effects apply to athletes whose performance is based on accuracy and complex body movements, such as soccer players or golfers, they said.

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The above story is reprinted from materials provided by American Psychological Association (APA), via Newswise.

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Journal Reference:

  1. Jürgen Beckmann, Peter Gröpel, Felix Ehrlenspiel. Preventing Motor Skill Failure Through Hemisphere-Specific Priming: Cases From Choking Under Pressure.. Journal of Experimental Psychology: General, 2012; DOI: 10.1037/a0029852

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/SFepY27Hj44/120919124900.htm
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Weight gain worry for stressed black girls

ScienceDaily (Sep. 19, 2012) — Could the impact of chronic stress explain why American black girls are more likely to be overweight than white girls? According to Dr. Tomiyama of the University of California, Los Angeles in the U.S., and her colleagues, higher levels of stress over 10 years predict greater increases in body weight over time in both black and white girls. However, the experience of chronic stress appears to have a greater negative effect on black girls' weight, which may explain racial disparities in obesity levels.

The work is published online in Springer's journal, Annals of Behavioral Medicine.

In the United States, the prevalence of obesity in black populations is 50 percent higher than in whites. This difference is apparent even in childhood, and particularly in female adolescents. In addition, ethnic minorities tend to experience greater psychological stress than whites due, in part, to perceived racial discrimination.

Tomiyama and team looked at whether the experience of chronic stress in young girls over a 10-year period might have an effect on Body Mass Index (BMI), a measure of obesity. They were also interested in whether this effect might be different in white and black teenage girls.

Using data from the National Heart, Lung and Blood Institute's (NHLBI) Growth and Health Study, the researchers assessed the prevalence of obesity in 2,379 black and white girls beginning at age 10 and followed up for 10 years. They also looked at their experience of psychological stress over that time.

Over 10 years, more black girls were overweight or obese than white girls, who reported more stress than black girls. In addition, levels of chronic stress predicted greater weight in both groups. Even though black girls reported less stress overall, the effect of chronic stress on weight was stronger for these girls with one unit increase in stress leading to 0.8 BMI unit increase every two years. Comparatively, one unit of stress led to 0.55 BMI unit increase in white girls.

The authors conclude: "Our study documents a relationship between chronic perceived stress and BMI over a decade of growth in black and white girls. However, the relationship between perceived stress and BMI is stronger in black girls. Psychological stress may lead to weight gain through behavioral pathways, such as increased food consumption and sedentary lifestyles, but also directly through prolonged exposure to biological stress mediators such as cortisol."

Given how ubiquitous stress is, these findings raise the flag that stress may be playing a major role in the obesity epidemic as well as contributing to racial disparities.

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The above story is reprinted from materials provided by Springer Science+Business Media, via EurekAlert!, a service of AAAS.

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Journal Reference:

  1. A. Janet Tomiyama, Eli Puterman, Elissa S. Epel, David H. Rehkopf, Barbara A. Laraia. Chronic Psychological Stress and Racial Disparities in Body Mass Index Change Between Black and White Girls Aged 10–19. Annals of Behavioral Medicine, 2012; DOI: 10.1007/s12160-012-9398-x

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/ECX83vf5riE/120919125734.htm
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Many parents believe that letting young children taste alcohol discourages later use

ScienceDaily (Sep. 19, 2012) — One in four mothers believe that letting young children taste alcohol may discourage them from drinking in adolescence and 40 percent believe that not allowing children to taste alcohol will only make it more appealing, according to a new study by RTI International and the University of North Carolina at Chapel Hill.

The study, published in the Archives of Pediatrics and Adolescent Medicine, explored whether parents purposefully introduce children to alcohol at a young age and, if so, why. It also examined parenting practices that impact children's opportunity to try alcohol.

"The idea that early exposure to alcohol can discourage a child's interest in drinking has a strong foothold among some parents of elementary school aged children," said Christine Jackson, Ph.D., a social ecologist at RTI International and the study's lead author.

The study is based on data collected from interviews with 1,050 mothers and their third-grade children. The participants were recruited for a four-year intervention trial that will examine the long-term implications of children's early sipping experience.

Adult participants in the study were asked about their alcohol-specific attitudes and practices as well as their opinions on providing tastes of alcohol to their children.

At least a quarter of the mothers said allowing their children to taste alcohol would discourage their curiosity in it because they would not like the flavor and because it will remove the "forbidden fruit" appeal of it. Forty percent of the mothers interviewed felt that not allowing children to have alcohol would only increase their desire to have it.

Twenty-two percent of the mothers believed that children who taste alcohol at home with their parents would be better at resisting alcohol-related peer pressure, and 26 percent thought it would make them less likely to experiment with risky drinking in middle school.

"These findings indicate that many parents mistakenly expect that the way children drink at home, under parental supervision, will be replicated when children are with peers," Jackson said. "More research is needed to understand how parents acquire these ideas and to understand the relationship between early sipping and alcohol use in adolescence."

The children who participated in the study were asked whether they had tasted beer, wine or other drinks containing alcohol and whether their parents had ever given them a sip of alcohol. Nearly 33 percent of the children participating in the study reported having tasted beer, wine or other alcohol.

The researchers found a strong association between parents who were in favor of allowing their children to taste alcohol and children's reported alcohol use. According to the study, this finding is noteworthy because early introduction to alcohol is a primary risk factor for problem drinking during adolescence.

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The above story is reprinted from materials provided by RTI International.

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Journal Reference:

  1. Jackson C, Ennett ST, Dickinson DM. Letting Children Sip: Understanding Why Parents Allow Alcohol Use by Elementary School–aged Children. Archives of Pediatrics & Adolescent Medicine, 2012; DOI: 10.1001/archpediatrics.2012.1198

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/YXyZXZELc9w/120919142010.htm
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Yogurt consumption, blood pressure, and incident hypertension

ScienceDaily (Sep. 19, 2012) — Adding more yogurt to your diet without increasing the number of calories you eat may help lower your risk of high blood pressure, according to new research presented at the American Heart Association's High Blood Pressure Research 2012 Scientific Sessions.

A recent study found long-term yogurt-eaters were less likely to develop high blood pressure and on average had lower systolic blood pressure than those who didn't eat yogurt. Systolic blood pressure is the top number in a blood pressure reading. It measures the force of blood against the walls of your arteries when your heart is beating.

During the 15 year study, researchers followed more than 2,000 volunteers who did not have high blood pressure at the start of the study. Yogurt consumption was measured by questionnaires filled out by the volunteers at three intervals over the study period. Study participants were 31 percent less likely to develop high blood pressure if at least 2 percent of their daily calories came from yogurt, which would be like eating at least one six-ounce cup of low-fat yogurt every three days. In addition, their systolic blood pressure increased less than that of people who didn't eat yogurt.

The study was funded by the Framingham Heart Study of the National Heart, Lung, and Blood Institute of the National Institutes of Health and by a research grant from the Dannon Company, Inc.

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The above story is reprinted from materials provided by American Heart Association.

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/mJMmGBSd0kY/120919190600.htm
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Sesame and rice bran oil lowers blood pressure, improves cholesterol

ScienceDaily (Sep. 18, 2012) — People who cooked with a blend of sesame and rice bran oils saw a significant drop in blood pressure and improved cholesterol levels, according to new research presented at the American Heart Association's High Blood Pressure Research 2012 Scientific Sessions.

The researchers found cooking with a combination of these oils in a variety of ways worked nearly as well as a commonly prescribed high blood pressure medication, and that the use of the oil blend with medication yielded even more impressive results.

"Rice bran oil, like sesame oil, is low in saturated fat and appears to improve a patient's cholesterol profile," said Devarajan Sankar, M.D, Ph.D., a research scientist in the Department of Cardiovascular Disease at Fukuoka University Chikushi Hospital in Chikushino, Japan. "Additionally, it may reduce heart disease risk in other ways, including being a substitute for less healthy oils and fats in the diet."

The 60-day study in New Delhi, India, divided 300 people with mild to moderately high blood pressure into three groups. One group was treated with a commonly used blood pressure lowering medication called a calcium-channel blocker (nifedipine). The second group was given the oil blend and told to use about an ounce each day in their meals.

The final group received the calcium channel blocker and the oil blend.

All three groups, with approximately an equal number of men and women, average age of 57, saw drops in their systolic blood pressure. Systolic blood pressure is the top number in a blood pressure reading and measures the force of blood against your artery walls when the heart is pumping.

Systolic blood pressure dropped an average of 14 points for those using only the oil blend and 16 points for those taking medication. Those using both saw a 36-point drop.

Diastolic blood pressure also dropped significantly: 11 points for those eating the oil, 12 for those on medication and 24 for those using both. Diastolic blood pressure is the bottom number in a blood pressure reading that measures the force of blood against your artery walls when your heart is at rest between beats.

As for cholesterol, those using the oils saw a 26 percent drop in their LDL ("bad" cholesterol) and a 9.5 percent increase in the HDL ("good" cholesterol), while no changes in cholesterol were observed for the patients who used only the calcium-channel blocker. Those who took the calcium channel blocker and the oils had a 27 percent drop in LDL levels and a 10.9 percent increase in the HDL.

Healthier fatty acids and antioxidants, such as sesamin, sesamol, sesamolin and oryzanol, in the oil blends may be responsible for the results, Sankar said. These antioxidants, mono and poly unsaturated oils are compounds found in plants and have been linked with lower blood pressure and total cholesterol in earlier studies.

Additional studies are needed to determine if the oil blend is as beneficial as it seems. The combination was made specifically for this study, and there are no plans to market it commercially, Sankar said. Blending these oils yourself would not necessarily produce these effects.

People with high blood pressure should not stop taking their medications and should speak with their doctors before trying any product that might change their blood pressure to ensure they're being properly monitored.

Co-authors are.Ravinder Singh, M.B.B.S., and Biprabuddha Chatterjee, M.Sc.

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The above story is reprinted from materials provided by American Heart Association.

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20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/YlwFL8DVvuE/120919190151.htm
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Misinformation: Why it sticks and how to fix it

ScienceDaily (Sep. 19, 2012) — Childhood vaccines do not cause autism. Barack Obama was born in the United States. Global warming is confirmed by science. And yet, many people believe claims to the contrary.

Why does that kind of misinformation stick? A new report published in Psychological Science in the Public Interest, a journal of the Association for Psychological Science, explores this phenomenon. Psychological scientist Stephan Lewandowsky of the University of Western Australia and colleagues highlight the cognitive factors that make certain pieces of misinformation so "sticky" and identify some techniques that may be effective in debunking or counteracting erroneous beliefs.

The main reason that misinformation is sticky, according to the researchers, is that rejecting information actually requires cognitive effort. Weighing the plausibility and the source of a message is cognitively more difficult than simply accepting that the message is true -- it requires additional motivational and cognitive resources. If the topic isn't very important to you or you have other things on your mind, misinformation is more likely to take hold.

And when we do take the time to thoughtfully evaluate incoming information, there are only a few features that we are likely to pay attention to: Does the information fit with other things I believe in? Does it make a coherent story with what I already know? Does it come from a credible source? Do others believe it?

Misinformation is especially sticky when it conforms to our preexisting political, religious, or social point of view. Because of this, ideology and personal worldviews can be especially difficult obstacles to overcome.

Even worse, efforts to retract misinformation often backfire, paradoxically amplifying the effect of the erroneous belief.

"This persistence of misinformation has fairly alarming implications in a democracy because people may base decisions on information that, at some level, they know to be false," says Lewandowsky.

"At an individual level, misinformation about health issues -- for example, unwarranted fears regarding vaccinations or unwarranted trust in alternative medicine -- can do a lot of damage. At a societal level, persistent misinformation about political issues (e.g., Obama's health care reform) can create considerable harm. On a global scale, misinformation about climate change is currently delaying mitigative action."

Though misinformation may be difficult to correct, all is not lost. According to Lewandowsky, "psychological science has the potential to counteract all those harms by educating people and communicators about the power of misinformation and how to meet it."

In their report, Lewandowsky and colleagues offer some strategies for setting the record straight.

  • Provide people with a narrative that replaces the gap left by false information
  • Focus on the facts you want to highlight, rather than the myths
  • Make sure that the information you want people to take away is simple and brief
  • Consider your audience and the beliefs they are likely to hold
  • Strengthen your message through repetition

Research has shown that attempts at "debiasing" can be effective in the real world when based on these evidence-based strategies.

The report, "Misinformation and its Correction: Continued Influence and Successful Debiasing," is published in the September issue of Psychological Science in the Public Interest and is written by Stephan Lewandowsky and Ullrich Ecker of the University of Western Australia, Colleen Seifert and Norbert Schwarz of the University of Michigan, and John Cook of the University of Queensland and the University of Western Australia.

The report also features a commentary written by Edward Maibach of George Mason University.

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The above story is reprinted from materials provided by Association for Psychological Science.

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Journal Reference:

  1. S. Lewandowsky, U. K. H. Ecker, C. M. Seifert, N. Schwarz, J. Cook. Misinformation and Its Correction: Continued Influence and Successful Debiasing. Psychological Science in the Public Interest, 2012; 13 (3): 106 DOI: 10.1177/1529100612451018

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/YOHIorEP93o/120919191212.htm
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Reading food labels helps shoppers stay thinner

ScienceDaily (Sep. 19, 2012) — Shoppers -- particularly women -- who take the time to read food labels are thinner than those who don't.

These findings are from a recently released study authored by Steven T. Yen, a University of Tennessee professor in the Institute of Agriculture's Department of Agricultural and Resource Economics, in conjunction with researchers at the University of Santiago de Compostela in Spain, the University of Arkansas and the Norwegian Institute for Agricultural Finance Research.

Women who read food labels weighed nearly 9 pounds less than women who didn't read labels, according to the study. It also found that women read labels more than men, and the smoking population paid even less attention to label information.

"Reading food labels is important because it allows shoppers to improve diet quality by making more informed decisions in food purchases," Yen said.

The researchers used data from the annual "National Health Interview Survey" that was conducted by the Centers for Disease Control and Prevention. The survey collected more than 25,000 observations on health, eating and shopping habits.

The study, which was published in the "Agricultural Economics" journal, examined the relationship between nutritional label use and obesity. The results showed that reading labels played a role in reducing obesity, especially among women.

"These findings imply that health education campaigns can employ nutritional labels as one of the instruments for reducing obesity," the report states.

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Journal Reference:

  1. Maria L. Loureiro, Steven T. Yen, Rodolfo M. Nayga Jr. The effects of nutritional labels on obesity. Agricultural Economics, 2012; 43 (3): 333 DOI: 10.1111/j.1574-0862.2012.00586.x

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/z6plCqVEIs4/120919142012.htm
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The more people rely on their intuitions, the more cooperative they become

ScienceDaily (Sep. 19, 2012) — It's an age old question: Why do we do good? What makes people sometimes willing to put "We" ahead of "Me?" Perhaps our first impulse is to be selfish, and cooperation is all about reining in greed. Or maybe cooperation happens spontaneously, and too much thinking gets in the way.

Harvard scientists are getting closer to an answer, showing that people's first response is to cooperate and that stopping to think encourages selfishness.

David Rand, a Post-Doctoral Fellow in Psychology, Joshua Greene, the John and Ruth Hazel Associate Professor of the Social Sciences in the Department of Psychology, and Martin Nowak, Professor of Mathematics and of Biology, and Director of the Program for Evolutionary Dynamics, have published their findings in the September 20 issue of Nature. They recruited thousands of participants to play a "public goods game" in which it's "Me" vs. "Us." Subjects were put into small groups and faced with a choice: Keep the money you've been given, or contribute it into a common pool that grows and benefits the whole group. Hold onto the money and you come out ahead, but the group does best when everyone contributes.

The researchers wanted to know whether people's first impulse is cooperative or selfish. To find out, they started by looking at how quickly different people made their choices, and found that faster deciders were more likely to contribute to the common good.

Next they forced people to go fast or to stop and think, and found the same thing: Faster deciders tended to be more cooperative, and the people who had to stop and think gave less.

Finally, the researchers tested their hypothesis by manipulating people's mindsets. They asked some people to think about the benefits of intuition before choosing how much to contribute. Others were asked to think about the virtues of careful reasoning. Once again, intuition promoted cooperation, and deliberation did the opposite.

While some might interpret the results as suggesting that cooperation is "innate" or "hard-wired," if anything they highlight the role of experience. People who had better opinions of those around them in everyday life showed more cooperative impulses in these experiments, and previous experience with these kinds of studies eroded those impulses.

"In daily life, it's generally in your interest to be cooperative," Rand said. "So we internalize cooperation as the right way to behave. Then when we come into unusual environments, where incentives like reputation and sanctions are removed, our first response is to keep behaving the way we do in normal life. When we think about it, however, we realize that this is one of those rare situations where we can be selfish and get away with it."

Unlike many psychology studies, which use small numbers of college students, these experiments tested thousands of people from around the world using Amazon Mechanical Turk, an online labor market that's becoming an increasingly popular tool for social science research.

According to Rand, the findings highlight an interesting and counterintuitive truth -- that careful thought and reflection have a dark side. But is reflection always bad?

"When it's 'Me' vs. 'Us,' our intuitions seem to work well. That's what's going on here," explains Joshua Greene. "But what happens when people have different moral intuitions, for example, about abortion or raising taxes? When intuitions clash -- when it's the values of 'Us' vs. 'Them' -- reasoning and reflection may be our best hope for reconciling our differences."

"Over millions of years we've evolved the capacity for cooperation," explains Martin Nowak. "These psychological experiments examine the causes of cooperation on a shorter timescale, on the order of seconds. Both perspectives are essential as we face global problems which require cooperation on a massive scale. We need to understand where cooperation comes from historically and how best to make it happen here and now."

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The above story is reprinted from materials provided by Harvard University, via EurekAlert!, a service of AAAS.

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Journal Reference:

  1. David G. Rand, Joshua D. Greene, Martin A. Nowak. Spontaneous giving and calculated greed. Nature, 2012; 489 (7416): 427 DOI: 10.1038/nature11467

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/sQyIezy4Wss/120919142144.htm
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Your memory is like the telephone game, altered with each retelling

ScienceDaily (Sep. 19, 2012) — Remember the telephone game where people take turns whispering a message into the ear of the next person in line? By the time the last person speaks it out loud, the message has radically changed. It's been altered with each retelling.

Turns out your memory is a lot like the telephone game, according to a new Northwestern Medicine study.

Every time you remember an event from the past, your brain networks change in ways that can alter the later recall of the event. Thus, the next time you remember it, you might recall not the original event but what you remembered the previous time. The Northwestern study is the first to show this.

"A memory is not simply an image produced by time traveling back to the original event -- it can be an image that is somewhat distorted because of the prior times you remembered it," said Donna Bridge, a postdoctoral fellow at Northwestern University Feinberg School of Medicine and lead author of the paper on the study recently published in the Journal of Neuroscience. "Your memory of an event can grow less precise even to the point of being totally false with each retrieval."

Bridge did the research while she was a doctoral student in lab of Ken Paller, a professor of psychology at Northwestern in the Weinberg College of Arts and Sciences.

The findings have implications for witnesses giving testimony in criminal trials, Bridge noted.

"Maybe a witness remembers something fairly accurately the first time because his memories aren't that distorted," she said. "After that it keeps going downhill."

The published study reports on Bridge's work with 12 participants, but she has run several variations of the study with a total of 70 people. "Every single person has shown this effect," she said. "It's really huge."

"When someone tells me they are sure they remember exactly the way something happened, I just laugh," Bridge said.

The reason for the distortion, Bridge said, is the fact that human memories are always adapting.

"Memories aren't static," she noted. "If you remember something in the context of a new environment and time, or if you are even in a different mood, your memories might integrate the new information."

For the study, people were asked to recall the location of objects on a grid in three sessions over three consecutive days. On the first day during a two-hour session, participants learned a series of 180 unique object-location associations on a computer screen. The next day in session two, participants were given a recall test in which they viewed a subset of those objects individually in a central location on the grid and were asked to move them to their original location. Then the following day in session three, participants returned for a final recall test.

The results showed improved recall accuracy on the final test for objects that were tested on day two compared to those not tested on day two. However, people never recalled exactly the right location. Most importantly, in session three they tended to place the object closer to the incorrect location they recalled during day two rather than the correct location from day one.

"Our findings show that incorrect recollection of the object's location on day two influenced how people remembered the object's location on day three," Bridge explained. "Retrieving the memory didn't simply reinforce the original association. Rather, it altered memory storage to reinforce the location that was recalled at session two."

Bridge's findings also were supported when she measured participants' neural signals --the electrical activity of the brain -- during session two. She wanted to see if the neural signals during session two predicted anything about how people remembered the object's location during session three.

The results revealed a particular electrical signal when people were recalling an object location during session two. This signal was greater when -- the next day -- the object was placed close to that location recalled during session two. When the electrical signal was weaker, recall of the object location was likely to be less distorted.

"The strong signal seems to indicate that a new memory was being laid down," Bridge said, "and the new memory caused a bias to make the same mistake again."

"This study shows how memories normally change over time, sometimes becoming distorted," Paller noted. "When you think back to an event that happened to you long ago -- say your first day at school -- you actually may be recalling information you retrieved about that event at some later time, not the original event."

The research was supported by National Science Foundation grant BCS1025697 and National Institute of Neurological Disorders and Stroke of the National Institutes of Health grant T32 NS047987.

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The above story is reprinted from materials provided by Northwestern University. The original article was written by Marla Paul.

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Journal Reference:

  1. D. J. Bridge, K. A. Paller. Neural Correlates of Reactivation and Retrieval-Induced Distortion. Journal of Neuroscience, 2012; 32 (35): 12144 DOI: 10.1523/JNEUROSCI.1378-12.2012

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

20 Sep, 2012


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Prejudice can cause depression at the societal, interpersonal, and intrapersonal levels

Written By empapat on Selasa, 18 September 2012 | 16.46

ScienceDaily (Sep. 18, 2012) — Although depression and prejudice traditionally fall into different areas of study and treatment, a new article suggests that many cases of depression may be caused by prejudice from the self or from another person. In an article published in the September 2012 issue of Perspectives on Psychological Science, a journal of the Association for Psychological Science, William Cox of the University of Wisconsin-Madison and colleagues argue that prejudice and depression are fundamentally connected.

Consider the following sentence: "I really hate _____. I hate the way _____ look. I hate the way _____ talk."

What words belong in the blanks? It's possible that the statement expresses prejudice toward a stigmatized group: "I really hate Black people," "I hate the way gay men look," or "I hate the way Jews talk." But this statement actually comes from a depressed patient talking about herself: "I really hate me. I hate the way I look. I hate the way I talk."

The fact that the statement could have been completed in two equally plausible ways hints at a deep connection between prejudice and depression. Indeed, Cox and colleagues argue that the kinds of stereotypes about others that lead to prejudice and the kinds of schemas about the self that lead to depression are fundamentally similar. Among many features that they have in common, stereotypes of prejudice and schemas of depression are typically well-rehearsed, automatic, and difficult to change.

Cox and colleagues propose an integrated perspective of prejudice and depression, which holds that stereotypes are activated in a "source" who then expresses prejudice toward a "target," causing the target to become depressed.

This depression caused by prejudice -- which the researchers call deprejudice -- can occur at many levels. In the classic case, prejudice causes depression at the societal level (e.g., Nazis' prejudice causing Jews' depression), but this causal chain can also occur at the interpersonal level (e.g., an abuser's prejudice causing an abusee's depression), or even at the intrapersonal level, within a single person (e.g., a man's prejudice against himself causing his depression).

The researchers state that the focus of their theory is on cases of depression that are driven primarily by the negative thoughts that people have about themselves or that others have about them and does not address "depressions caused by neurochemical, genetic, or inflammatory processes." Understanding that many people with depression are not "just" depressed -- they may have prejudice against themselves that causes their depression -- has powerful theoretical implications for treatment.

Cox and colleagues propose that interventions developed and used by depression researchers -- such as cognitive behavior therapy and mindfulness training -- may be especially useful in combating prejudice. And some interventions developed and used by prejudice researchers may be especially useful in treating depression.

Using a wider lens to see the common processes associated with depression and prejudice will help psychological scientists and clinicians to understand these phenomena better and develop cross-disciplinary interventions that can target both problems.

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Journal Reference:

  1. W. T. L. Cox, L. Y. Abramson, P. G. Devine, S. D. Hollon. Stereotypes, Prejudice, and Depression: The Integrated Perspective. Perspectives on Psychological Science, 2012; 7 (5): 427 DOI: 10.1177/1745691612455204

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

19 Sep, 2012


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Longer exercise provides added benefit to children's health

ScienceDaily (Sep. 18, 2012) — Twenty minutes of daily, vigorous physical activity over just three months can reduce a child's risk of diabetes as well as his total body fat -- including dangerous, deep abdominal fat -- but 40 minutes works even better, researchers report.

"If exercise is good for you, then more exercise ought to be better for you and that is what we found for most of our outcomes," said Dr. Catherine Davis, clinical health psychologist at the Institute of Public and Preventive Health at Georgia Health Sciences University.

Pediatric and adult studies have shown the metabolic benefits of aerobic activity but had yet to dissect differences in the dose response, or the amount of activity needed to elicit a given benefit. The study published in the Journal of the American Medical Association looked at 222 overweight, previously inactive 7- to 11-year olds in the Augusta, Ga., area and found more is better.

"Obesity is a growing public health crisis that is affecting youth throughout the United States, and we know that obesity can contribute to the development of type 2 diabetes," said Dr. Michael Lauer, Director of the National Heart, Lung and Blood Institute Division of Cardiovascular Sciences of the National Institute of Health. "This research adds to the body of evidence that physical activity improves children's health, that longer periods of exercise provide a greater benefit and that increased physical activity among overweight and obese children could stave off the onset of type 2 diabetes."

A third of the study participants maintained their typically sedentary lifestyle; a third began a 20-minute heart-rate-raising, after-school exercise routine for three months; and a third exercised for 40 minutes after school.

While their primary focus was insulin resistance, a risk factor for diabetes, the researchers also measured total body fat, visceral fat and aerobic fitness over the study's course.

Children who exercised for 40 minutes had a 22 percent reduction in insulin resistance versus the controls, while the 20-minute group experienced an 18 percent reduction, said Davis, the study's lead author.

The extra 20 minutes also helped the children lose more total body fat and visceral fat while fitness, which appeared driven by intensity rather than duration, gained a similar boost from both time periods. Benefits were gained without restrictive diets and worked equally well in black and white boys and girls.

Davis' research team kept both groups moving with running and tag games and modified sports. "Regulation sports tend to have kids standing around a lot waiting for the ball. We had enough balls so everyone was moving all the time," she said. They kept it fun, giving non-food rewards, such as small toys, for children who kept their heart rates high. "It had to be fun or they would not keep coming," said Davis, noting the 94 percent retention rate of study participants.

She hopes the evidence of the solid health benefits of a fun, vigorous and relatively short exercise routine will be used to design public health interventions for a society in which one-third of elementary school children are overweight.

"It's practical in the sense that we were able to quantify the dose required to make these changes," Davis said. "If you are able to get kids active for 20 minutes every day in school, whether through physical education or taking a running break during lunch, that can make a real difference." She noted that while schools are a great place to start, jam-packed curricula likely mean a 40-minute exercise routine will require after-hours programs as well.

"You can reach a lot of kids by making changes at school," Davis said. "We don't want this to just be for athletic or coordinated kids but for all kids, especially the ones who are less likely to be on a sports team."

Childhood obesity rates in the United States have been climbing for more than a decade. While they seem to be plateauing, the unprecedented levels have serious consequences for children's health and longevity, Davis said. A primary example is the emergence of type 2 diabetes, previously considered an adult, lifestyle-related problem with serious implications for cardiovascular health and more. One of the first indications of trouble is increased insulin resistance, how much insulin the pancreas must produce to enable glucose circulating in the blood to become energy for the cells. In this study, researchers showed a benefit of 40 minutes of daily exercise on the disposition index -- the ratio of insulin resistance to the body's ability to secrete insulin -- a proven predictor of diabetes development in adults.

"When your body is no longer able to secrete enough insulin to overcome your body's resistance to it, that's when it becomes diabetes," Davis said, noting that in insulin resistance, pancreases must work overtime producing extra insulin to convert excess blood glucose to usable energy. Without sufficient insulin, a vicious cycle results as energy-starved cells increase the appetite and people eat more creating even more glucose to convert. "Exercise basically gives the pancreas a break and could prevent or delay type 2 diabetes as long as people remain active," Davis said. Longer-term and follow-up studies are needed to find out what happens with these children over time and how to help them sustain a healthy lifestyle.

In 2005, a federal panel, co-chaired by Dr. William B. Strong, a pediatric cardiologist and retired Professor at the Medical College of Georgia at GHSU, recommended 60 minutes or more of daily vigorous physical activity for school-age children. The supervised 40-minute exercise sessions in the study likely resulted in a similar amount of cumulative activity, Davis said. "And, unfortunately 40 minutes is a lot more activity than many children are getting these days."

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Journal Reference:

  1. Davis CL, Pollock NK, Waller JL, Allison JD, Dennis BA, Bassali R, Melendez A, Boyle CA, Gower BA. Exercise dose and diabetes risk in overweight and obese children: A randomized, controlled trial. JAMA, 2012

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

18 Sep, 2012


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Pacifiers may have emotional consequences for boys

ScienceDaily (Sep. 18, 2012) — Pacifiers may stunt the emotional development of baby boys by robbing them of the opportunity to try on facial expressions during infancy.

Three experiments by a team of researchers led by psychologists from the University of Wisconsin-Madison tie heavy pacifier use as a young child to poor results on various measures of emotional maturity.

The study, published September 18 by the journal Basic and Applied Social Psychology, is the first to associate pacifiers with psychological consequences. The World Health Organization and American Academy of Pediatrics already call for limiting pacifier use to promote breast-feeding and because of connections to ear infections or dental abnormalities.

Humans of all ages often mimic -- unwittingly or otherwise -- the expressions and body language of the people around them.

"By reflecting what another person is doing, you create some part of the feeling yourself," says Paula Niedenthal, UW-Madison psychology professor and lead author of the study. "That's one of the ways we understand what someone is feeling -- especially if they seem angry, but they're saying they're not; or they're smiling, but the context isn't right for happiness."

Mimicry can be an important learning tool for babies.

"We can talk to infants, but at least initially they aren't going to understand what the words mean," Niedenthal says. "So the way we communicate with infants at first is by using the tone of our voice and our facial expressions."

With a pacifier in their mouth, a baby is less able to mirror those expressions and the emotions they represent.

The effect is similar to that seen in studies of patients receiving injections of Botox to paralyze facial muscles and reduce wrinkles. Botox users experience a narrower range of emotions and often have trouble identifying the emotions behind expressions on other faces.

"That work got us thinking about critical periods of emotional development, like infancy," says Niedenthal, whose work is supported by the French Agence Nationale de la Recherche. "What if you always had something in your mouth that prevented you from mimicking and resonating with the facial expression of somebody?"

The researchers found six- and seven-year-old boys who spent more time with pacifiers in their mouths as young children were less likely to mimic the emotional expressions of faces peering out from a video.

College-aged men who reported (by their own recollections or their parents') more pacifier use as kids scored lower than their peers on common tests of perspective-taking, a component of empathy.

A group of college students took a standard test of emotional intelligence measuring the way they make decisions based on assessing the moods of other people. Among the men in the group, heavier pacifier use went hand-in-hand with lower scores.

"What's impressive about this is the incredible consistency across those three studies in the pattern of data," Niedenthal says. "There's no effect of pacifier use on these outcomes for girls, and there's a detriment for boys with length of pacifier use even outside of any anxiety or attachment issues that may affect emotional development."

Girls develop earlier in many ways, according to Niedenthal, and it is possible that they make sufficient progress in emotional development before or despite pacifier use. It may be that boys are simply more vulnerable than girls, and disrupting their use of facial mimicry is just more detrimental for them.

"It could be that parents are inadvertently compensating for girls using the pacifier, because they want their girls to be emotionally sophisticated. Because that's a girly thing," Niedenthal says. "Since girls are not expected to be unemotional, they're stimulated in other ways. But because boys are desired to be unemotional, when you plug them up with a pacifier, you don't do anything to compensate and help them learn about emotions."

Suggesting such a simple and common act has lasting and serious consequences is far from popular.

"Parents hate to have this discussion," Niedenthal says. "They take the results very personally. Now, these are suggestive results, and they should be taken seriously. But more work needs to be done."

Sussing out just why girls seem to be immune (or how they may compensate) is an important next step, as is an investigation of what Niedenthal calls "dose response."

"Probably not all pacifier use is bad at all times, so how much is bad and when?" she asks. "We already know from this work that nighttime pacifier use doesn't make a difference, presumably because that isn't a time when babies are observing and mimicking our facial expressions anyway. It's not learning time."

But even with more research planned to further explain the new results, Niedenthal is comfortable telling parents to consider occasionally pocketing the pacifier.

"I'd just be aware of inhibiting any of the body's emotional representational systems," Niedenthal says. "Since a baby is not yet verbal -- and so much is regulated by facial expression -- at least you want parents to be aware of that using something like a pacifier limits their baby's ability to understand and explore emotions. And boys appear to suffer from that limitation."

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The above story is reprinted from materials provided by University of Wisconsin-Madison. The original article was written by Chris Barncard.

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19 Sep, 2012


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Psychologists study the effects of diagram orientation on comprehension

ScienceDaily (Sep. 18, 2012) — The orientation of a diagram on the page of a textbook may seem inconsequential, but it can have a significant impact on a reader's ability to comprehend the information as presented, according to a team of researchers at UC Santa Barbara, Vanderbilt University, and West Carolina University. Their findings appear in a recent issue of the journal Bioscience.

Focusing on variously formatted cladograms -- also known as phylogenetic trees -- the researchers found that two diagrams may contain the same information, but they aren't necessarily equivalent in terms of how the information is interpreted. "In Western culture, we read from left to right, so we naturally come to a diagram with that behavior," said Andrew T. Stull, a researcher in the Department of Psychological & Brain Sciences at UCSB and an author of the paper. "The important point in this research, however, is that how efficiently a student comprehends the information presented in the phylogenetic tree depends on how the tree is angled."

As it turns out, when a diagonal tree extends from tips on the left to the root on the right, and the trunk angles downward to the right-hand side, the information is more easily accessible. "The way we interrogate the tree is first culturally based -- left to right -- and the strong diagonal line tends to make us flow one way or another," said Stull. "But that combined effect influences the accuracy, or how we're able to use the tree effectively."

However, most textbooks depict the diagonal cladogram in the upward orientation, Stull noted. "Many artists draw the diagram in an inefficient and potentially confusing way," he said. "Artists have a tendency to draw it at the upward angle, not realizing they'd communicate the information better if they angled it downward."

The researchers used a phylogenetic tree for their research because it is very important for a process called tree thinking. "It's the idea that from an evolutionary perspective, there is a distinctive relationship between taxa," said Stull. "It's not just that things line up together on a tree, but you can infer certain biological, physiological, and pharmaceutical commonalities that might be relevant. There are a lot of things you can do in knowing how all of life is organized, and each organism's relation to everything else."

Drawing them in tree form, Stull continued, should help teach students the relationships between organisms, and to anticipate the valuable information those relationships can provide.

The researchers used eye-tracking technology to carry out their research. They showed test subjects one tree, and then another, and asked them to determine whether or not they were the same. "In order to answer the question, they had to interpret the two images," Stull explained. "Then we took all the eye positions. What we found is that when people studied the tree with the upward diagonal trunk, they were less accurate than when the tree followed the downward diagonal."

Why the directional angle makes a difference may have to do with how organisms represented by the individual branches relate to their closest common ancestor and to those with a more distant common ancestor. "With upward angled trunks, it may be because they [students] are thinking of it from the root up," Stull said. "But it's more efficient to think of it from the branches down. So, from an artistic perspective, it makes more sense to build it that way. With that orientation, the user doesn't have to deconstruct it in order to access the information."

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19 Sep, 2012


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Late-night comedy television increases political discussion

ScienceDaily (Sep. 18, 2012) — The jokes, critiques and issues raised by late-night comedy television hosts may have a significant impact on how much people talk about the upcoming political election, based on a new study from the University of Michigan.

The study, which was just released electronically and due out soon in print in the September 2012 issue of Mass Communication and Society, found that the political satire can be just as effective as regular political news in encouraging discussion among audience members. The research also discovered that while both late-night comedy television and hard news engaged audiences, late-night audiences were more likely to use online interaction as a way to comment on political issues.

"The constructive role of comedy shows evidenced in this study suggests that political entertainment may serve as an important catalyst for revitalized civic life," Hoon Lee, the article's author said. "This is an important finding, because then political candidates may be willing to use comedy programs to enhance their images."

Over 700 individuals participated in an online experiment and survey. The author broke the individuals into groups, and participants either watched The Daily Show with Jon Steward, NBC Nightly News or a clip about a Walt Disney World resort, comparing scores on political participation and discussion between these groups.

The ability to spoof political figures on these television shows, such as Tina Fey's impersonation of Sarah Palin on Saturday Night Live in 2008, might raise questions about the power of show producers to influence the political agenda. This study doesn't tell us how the audience's voting decisions will be changed, but does suggest that such portrayals will make people talk about the portrayed issues with other people. This highlights the importance that late-night television comedy can have on politics.

"Political comedy can play a significant role in the public realm," Lee said. "The results from the experiment and survey demonstrate that exposure to late-night satire can enrich deliberative and participatory democracy."

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The above story is reprinted from materials provided by Taylor & Francis, via AlphaGalileo.

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Journal Reference:

  1. Hoon Lee. Communication Mediation Model of Late-Night Comedy: An Examination of the Mediating Role of Structural Features of Interpersonal Talk between Late-Night Comedy Viewing and Political Participation. Mass Communication and Society, 2012

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Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

19 Sep, 2012


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Women speak less when they're outnumbered

ScienceDaily (Sep. 18, 2012) — New experiments in group decision making show that having a seat at the table is very different than having a voice.

Scholars at Brigham Young University and Princeton examined whether women speak less than men when a group collaborates to solve a problem. In most groups that they studied, the time that women spoke was significantly less than their proportional representation -- amounting to less than 75 percent of the time that men spoke.

The new study is published by the top academic journal in political science, American Political Science Review.

"Women have something unique and important to add to the group, and that's being lost at least under some circumstances," said Chris Karpowitz, the lead study author and a political scientist at BYU.

There is an exception to this rule of gender participation, however. The time inequality disappeared when researchers instructed participants to decide by a unanimous vote instead of majority rule.

Results showed that the consensus-building approach was particularly empowering for women who were outnumbered by men in their group. Study co-author Tali Mendelberg of Princeton says these findings apply to many different settings.

"In school boards, governing boards of organizations and firms, and legislative committees, women are often a minority of members and the group uses majority rule to make its decisions," Mendelberg said. "These settings will produce a dramatic inequality in women's floor time and in many other ways. Women are less likely to be viewed and to view themselves as influential in the group and to feel that their 'voice is heard.'"

For their experiments, Karpowitz and Mendelberg recruited people to be part of a group and discuss the best way to distribute money they earned together from a hypothetical task. In all, the researchers observed 94 groups of at least five people.

On average, groups deliberated for 25 minutes before settling the matter. Participants voted by secret ballot, but half of the groups followed majority rule while the other half decided only with a unanimous vote.

Notably, the groups arrived at different decisions depending on women's participation -- swinging the group's stance on the level of generosity given to the lowest member of the group.

"When women participated more, they brought unique and helpful perspectives to the issue under discussion," Karpowitz said. "We're not just losing the voice of someone who would say the same things as everybody else in the conversation."

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Journal Reference:

  1. Christopher F. Karpowitz, Tali Mendelberg, Lee Shaker. Gender Inequality in Deliberative Participation. American Political Science Review, 2012; 106 (03): 533 DOI: 10.1017/S0003055412000329

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19 Sep, 2012


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When TV and marriage meet: TV's negative impact on romantic relationships

ScienceDaily (Sep. 18, 2012) — The status of a romantic relationship could be in jeopardy if the couple or an individual in the relationship are frequent television watchers, according to a study from Albion College.

The study, just released electronically and soon to be published in the September 2012 issue of Mass Communication and Society, found that the more an individual believed in television portrayals of romance, the less likely they were to be committed to their relationships. In August 2012, several of the most-watched television shows (Burn Notice, True Blood, The Big Bang Theory, and Two and a Half Men) featured romantic relationships prominently throughout their episodes. This research is especially important at helping individuals understand the impact that television viewing can have on their relationships.

"In this study I found that people who believe the unrealistic portrayals on TV are actually less committed to their spouses and think their alternatives to their spouse are relatively attractive," Dr. Jeremy Osborn, the article's author said. "My hope would be that people would read this article and take a look at their own relationships and the relationships of those around them. How realistic are your expectations for your partner and where did those expectations come from?"

Over 390 married couples participated in the study. The participants responded to questions about their satisfaction with their current romantic relationship, relationship expectations, relationship commitment, belief in television portrayals of romantic relationships, viewing frequency, and several others that focused on their spousal relationship. The research also discovered that the more an individual believed in the television romance, the higher people believed their relationship costs were. Relationship "costs" include a person's loss of personal freedom, loss of time, or their partner's unattractive qualities.

"We live in a society that perpetually immerses itself in media images from both TV and the web, but most people have no sense of the ways those images are impacting them," Osborn said. "The rate of marriage failure in the U. S. is not dropping, and it is important for people to have a sense of what factors are leading to the failure of so many relationships."

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Journal Reference:

  1. Jeremy L. Osborn. When TV and Marriage Meet: A Social Exchange Analysis of the Impact of Television Viewing on Marital Satisfaction and Commitment. Mass Communication and Society, 2012; 15 (5): 739 DOI: 10.1080/15205436.2011.618900

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19 Sep, 2012


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How much product information do consumers want?

ScienceDaily (Sep. 18, 2012) — A study published online in the Journal of Consumer Research finds that people can differ widely on the level of detail makes them feel they understand something. In experiments, the very same explanations that some subjects required before they would pay top dollar seemed to drive down what others were willing to pay. The natural trick for a marketer would be to figure out which customers are which. The study does that, too.

"The fact is that people differ," said Steven Sloman, professor of cognitive, linguistic, and psychological sciences at Brown University and an author on the paper. "Your advertising, your marketing, and your understanding of people has to be guided by an appreciation of who you are talking to."

The particular difference that lead author Philip Fernbach, assistant professor of marketing at the University of Colorado-Boulder's Leeds School of Business, and Sloman focused on in a series of experiments was the inclination of people to consider details of how products work. Thoughtful "explanation fiends" became more motivated the more the product was explained. More intuitive "explanation foes" felt confident in their understanding when the explanation was superficial but deeper detail eroded that understanding and ultimately their willingness to pay for the product.

In an essential respect these different groups of consumers are actually the same, said Fernbach. Both kinds of consumers want to feel like they understand how a product works before it will gain their trust.

"The more they feel like they understand, the more they will be willing to pay for the product," he said. But the consumers differ sharply on the level of detail that makes them feel informed.

Testing the test

Each of the study's four experiments measured the subjects' tendency to deliberate before responding to a question with a simple, standard quiz called the Cognitive Reflection Test (CRT). The test asks three questions that have intuitive, but wrong, answers. The correct answer requires a little more thought. Fernbach and Sloman thought it might predict each subject's inclination to consider detail. Sure enough, in each experiment the CRT accurately predicted whether the subject would be an explanation fiend or foe.

The first experiment assessed how 127 people who were recruited online rated their understanding of four products as they read four different levels of detail about how the products worked, presented in random order. Then they took the CRT. A low score indicated an intuition-oriented person while a high score indicates someone who thinks deeply.

The result? CRT low-scorers rated their understanding as higher when presented with less detail. High scorers on the CRT said they understood best when they read the greatest level of detail.

"The effect of mechanistic detail on judged understanding was moderated by cognitive reflection," wrote the authors of the study, which began when Fernbach was a postdoctoral researcher in Sloman's group at Brown. In addition to Fernbach and Sloman, the study's other authors are Brown undergraduates Robert St. Louis and Julia Shube.

The second experiment assessed what level of detail would motivate 223 new online volunteers to pay for a premium product with a special feature, compared to a less expensive generic competitor without that feature. The level of explanatory detail for the premium feature varied.

Low CRT scorers were most motivated to buy the premium product when given superficial detail, while high scorers showed an increasing degree of preference for the premium product as the level of detail increased.

The third experiment confirmed that only details explaining how a product works are pertinent to the dichotomy between explanation fiends (CRT high scorers) and explanation foes (CRT low scorers).

The money experiment

For marketers of consumer products, including funders of the research at Unilever, the big question is whether any of this psychology matters to what people will pay. The last experiment found that it can make a big difference and helped explain why.

The researchers again presented subjects with products and explanations of how they worked, but this time they broke them into two groups. Some were shown only a shallow explanation of each of four products and then rated their understanding. Then they indicated what they'd be willing to pay.

The researchers asked the other group to do extra work. After showing the volunteers explanations of two products, they asked them to generate their own explanation, to re-evaluate their level of understanding, and then to say how much they'd be willing to pay. By asking those subjects to explicitly explain the products, the authors forced them to confront whether they really understood or only felt they did.

The idea that people often feel they understand things better than they really do is called "the illusion of explanatory depth." Fernbach and Sloman's hypothesis was that explanation foes are especially prone to this illusion, even after encountering only a superficial explanation. Forcing them to confront their lack of understanding would dispel it, ultimately undermining what they'd be willing to pay.

That's exactly what happened.

"Low CRT participants began with a high feeling of understanding, which was subsequently shattered when they attempted to explain," the authors wrote. "High CRT participants were more conservative initially [about their level of understanding] and their judgments did not change after explanation."

What did change was how much fiends and foes of explanation were willing to pay before and after they were asked to explain how the products worked. Averaged over the two products, foes dropped their prices from $8 to less than $6 after their illusions were shattered. Explanation fiends, however, raised what they were willing to pay to about $8.50 from less than $6 after being asked to explain the products.

Sloman said he was struck by how strongly explanation foes harbor illusions about their understanding.

"We were actually shocked by how powerfully the data came out, that the effect really is almost entirely carried by the low CRT scorers," he said. "The people who do think before they respond don't seem to suffer from this illusion."

Fernbach said the lesson from the study for marketers -- how to vary the level of detail for different customers -- is particularly important for companies seeking to introduce novel products.

Getting it right could make a real difference in what customers are willing to pay.

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The above story is reprinted from materials provided by Brown University.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Philip M. Fernbach, Steven A. Sloman, Robert St. Louis, Julia N. Shube. Explanation Fiends and Foes: How Mechanistic Detail Determines Understanding and Preference. Journal of Consumer Research, 2012; [link]

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

18 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/b-YeWDjSCwA/120918113425.htm
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Higher levels of BPA in children and teens significantly associated with obesity

ScienceDaily (Sep. 18, 2012) — Researchers at NYU School of Medicine have revealed a significant association between obesity and children and adolescents with higher concentrations of urinary bisphenol A (BPA), a synthetic chemical recently banned by the U.S. Food and Drug Administration (FDA) from sippy cups and baby bottles. Still, the chemical continues to be used in aluminum cans, such as those containing soda.

The study appears in the September 19 issue of JAMA (Journal of the American Medical Association), dedicated to the theme of obesity.

"This is the first association of an environmental chemical in childhood obesity in a large, nationally representative sample," said lead investigator Leonardo Trasande, MD, MPP, associate professor of pediatrics and environmental medicine. "Our findings further demonstrate the need for a broader paradigm in the way we think about the obesity epidemic. Unhealthy diet and lack of physical activity certainly contribute to increased fat mass, but the story clearly doesn't end there."

BPA, a low-grade estrogen, was until recently found in plastic bottles labeled with the number 7 recycling symbol, and is still used as an internal coating for aluminum cans. Manufacturers say it provides an antiseptic function, but studies have shown the chemical disrupts multiple mechanisms of human metabolism that may increase body mass. BPA exposure has also been associated with cardiovascular disease, breast cancer, prostate cancer, neurological disorders, diabetes and infertility.

"In the U.S. population, exposure [to BPA] is nearly ubiquitous, with 92.6 percent of persons 6 years or older identified in the 2003-2004 National Health and Nutrition Examination Survey (NHANES) as having detectable BPA levels in their urine. A comprehensive, cross-sectional study of dust, indoor and outdoor air, and solid and liquid food in preschool-aged children suggested that dietary sources constitute 99 percent of BPA exposure," the investigators wrote.

Using a sample of nearly 3,000 children and adolescents, ages 6 through 19 years, randomly selected for measurement of urinary BPA concentration in the 2003-2008 NHANES, Dr. Trasande and his co-authors, Jan Blustein, MD, PhD, and Teresa Attina, MD, PhD, MPH, examined associations between urinary BPA concentrations and body mass.

After controlling for race/ethnicity, age, caregiver education, poverty to income ratio, sex, serum cotinine level, caloric intake, television watching, and urinary creatinine level, the researchers found children with the highest levels of urinary BPA had 2.6 times higher odds of being obese than those with the lowest measures of urinary BPA. Among the participants with the highest levels, 22.3 percent were obese compared with 10.3 percent of the participants with the lowest levels.

Further analyses showed this association to be statistically significant in only one racial subpopulation, white children and adolescents. The researchers also found that obesity was not associated with exposure to other environmental phenols commonly used in other consumer products, such as sunscreens and soaps.

"Most people agree the majority of BPA exposure in the United States comes from aluminum cans," Dr. Trasande said. "This data adds to already existing concerns about BPA and further supports the call to limit exposure of BPA in this country, especially in children. Removing it from aluminum cans is probably one of the best ways we can limit exposure. There are alternatives that manufacturers can use to line aluminum cans."

The researchers wrote in their study that advocates and policy makers have long been concerned about BPA exposure. "We note the recent FDA ban of BPA in baby bottles and sippy cups, yet our findings raise questions about exposure to BPA in consumer products used by older children. Last year, the FDA declined to ban BPA in aluminum cans and other food packaging, announcing 'reasonable steps to reduce human exposure to BPA in the human food supply' and noting that it will continue to consider evidence on the safety of the chemical. Carefully conducted longitudinal studies that assess the associations identified here will yield evidence many years in the future."

# # #

EDITOR'S NOTE: (JAMA. 2012;308[11]:1113-1121. Available pre-embargo to the media at http://media.jamanetwork.com)

About NYU School of Medicine:
NYU School of Medicine is one of the nation's preeminent academic institutions dedicated to achieving world class medical educational excellence. For 170 years, NYU School of Medicine has trained thousands of physicians and scientists who have helped to shape the course of medical history and enrich the lives of countless people. An integral part of NYU Langone Medical Center, the School of Medicine at its core is committed to improving the human condition through medical education, scientific research and direct patient care. The School also maintains academic affiliations with area hospitals, including Bellevue Hospital, one of the nation's finest municipal hospitals where its students, residents and faculty provide the clinical and emergency care to New York City's diverse population, which enhances the scope and quality of their medical education and training. Additional information about the NYU School of Medicine is available at http://school.med.nyu.edu/.

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The above story is reprinted from materials provided by NYU Langone Medical Center, via Newswise.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Trasande L, Attina TM, Blustein J. Association Between Urinary Bisphenol A Concentration and Obesity Prevalence in Children and Adolescents. JAMA, 2012; 308 (11): 1113-1121 DOI: 10.1001/2012.jama.11461

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

18 Sep, 2012


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Source: http://feeds.sciencedaily.com/~r/sciencedaily/living_well/~3/srCyVXXpmjE/120918111125.htm
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