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Different Bodies, Different Minds

15.02.2012
We like to think of ourselves as rational creatures, absorbing information, weighing it carefully, and making thoughtful decisions.
But, as it turns out, we’re kidding ourselves. Over the past few decades, scientists have shown there are many different internal and external factors influencing how we think, feel, communicate, and make decisions at any given moment.

One particularly powerful influence may be our own bodies, according to new research reviewed in the December issue of Current Directions in Psychological Science, a journal of the Association for Psychological Science.

Cognitive scientist Daniel Casasanto, of The New School for Social Research, has shown that quirks of our bodies affect our thinking in predictable ways, across many different areas of life, from language to mental imagery to emotion.

People come in all different shapes and sizes, and people with different kinds of bodies think differently — an idea Casasanto has termed the ‘body-specificity hypothesis.’

One way our bodies appear to shape our decision-making is through handedness. Casasanto and his colleagues explored whether being right-handed or left-handed might influence our judgments about abstract ideas like value, intelligence, and honesty.

Through a series of experiments, they found that, in general, people tend to prefer the things that they encounter on the same side as their dominant hand. When participants were asked which of two products to buy, which of two job applicants to hire, or which of two alien creatures looked more trustworthy, right-handers routinely chose the product, person, or creature they saw on the right side of the page, while left-handers preferred the one on the left. These kinds of preferences have been found in children as young as 5 years old.

But why should our handedness matter when it comes to making such abstract evaluations? It all comes down to fluency, according to Casasanto. “People like things better when they are easier to perceive and interact with,” he says. Right-handers interact with their environment more easily on the right than on the left, so they come to associate ‘good’ with ‘right’ and ‘bad’ with ‘left.’

This preference for things on our dominant side isn’t set in stone. Right-handers who’ve had their right hands permanently handicapped start to associate ‘good’ with ‘left.’ The same goes for righties whose ‘good’ hand is temporarily handicapped in the laboratory, Casasanto and colleagues found. “After a few minutes of fumbling with their right hand, righties start to think like lefties,” says Casasanto. “If you change people’s bodies, you change their minds.”

It’s clear that this association has implications beyond the laboratory. The body-specificity hypothesis may even play a role in voting behavior – Casasanto points out that many states still use butterfly ballots, with candidates’ names listed on the left and right.

“Since about 90 percent of the population is right-handed,” says Casasanto, “people who want to attract customers, sell products, or get votes should consider that the right side of a page or a computer screen might be the ‘right’ place to be.”

For more information about this study, please contact: Daniel Casasanto at casasanto@alum.mit.edu.

Current Directions in Psychological Science, a journal of the Association for Psychological Science, publishes concise reviews on the latest advances in theory and research spanning all of scientific psychology and its applications. For a copy of "Different Bodies, Different Minds: The Body Specificity of Language and Thought" and access to other Current Directions in Psychological Science research findings, please contact Divya Menon at 202-293-9300 or dmenon@psychologicalscience.org.

Divya Menon | EurekAlert!
Further information:
http://www.psychologicalscience.org

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