Friday, October 24, 2008

Time to update that old saying “cold hands, warm heart.” New research shows touching something warm can make you feel and act more warmly toward others.

Whether someone is deemed to have a “warm” or “cold” personality makes a powerful first impression. That led Yale University scientists to wonder whether physical warmth could promote psychological warmth, by subconsciously priming people to think better of others.

It took a sneaky study to find out: Scientists recruited 41 college students for what they thought was personality research. A lab worker escorted each participant up the elevator of Yale’s psychology building and casually asked for help holding her cup of coffee — either hot or iced — while she recorded the student’s name on a clipboard.

Inside the lab, the students were given a description of a fictitious person described as industrious, cautious and determined, and then rated that person’s presumed personality traits.

Students who had held the hot cup saw the person as more generous, sociable and good-natured than those who had held the cold cup — all traits that psychologists consider part of a “warm” personality, the researchers report in Friday’s edition of the journal Science.

Yet there were no differences between the two groups on ratings of honesty, attractiveness or strength, traits not associated with either warm or cold personalities.

Then researchers recruited 53 different students for a second study, having them briefly hold one of those heat or ice pads sold in drugstores for pain, supposedly as part of product-testing. Really the test was which trinket the students chose as a thank you for participating: An ice-cream coupon or bottled drink for themselves, or one for a friend.

Students who held the hot pad were more likely to choose a reward for a friend, while those who held the ice pad were more likely to choose a reward for themselves.

So is the moral of the story to hand out hot drinks when you want to make a good first impression?

Not quite. The bigger message is that subtle cues from our environment can significantly influence behavior and feelings, said lead researcher Lawrence Williams, who conducted the study while completing his psychology graduate degree at Yale.

Physical and psychological concepts “are much more closely aligned in the mind than we have previously appreciated,” said Mr. Williams, now at the University of Colorado.

Indeed, other research has found that the same brain region that processes physical temperature changes, called the insula, also processes feelings of trust and empathy associated with social warmth.

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