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Women wired to remember emotional experiences more
WASHINGTON -- Matrimonial lore says husbands never remember marital spats and wives never forget. A new study suggests a reason: Women's brains are wired both to feel and to recall emotions more keenly than the brains of men.
A team of psychologists tested groups of women and men for their ability to recall or recognize highly evocative photographs three weeks after first seeing them and found that the women's recollections were 10 to 15 percentage points more accurate.
The study, appearing in the Proceedings of the National Academy of Sciences, also used MRIs to image the subjects' brains as they were exposed to the pictures. It found that the women's neural responses to emotional scenes were much more active than the men's.
Turhan Canli, an assistant professor of psychology at State University of New York Stony Brook, said the study shows that a woman's brain is better organized to perceive and remember emotions.
"The wiring of emotional experience and the coding of that experience into memory is much more tightly integrated in women than in men," said Canli, the lead author of the study. "A larger percentage of the emotional stimuli used in the experiment were remembered by women than by men."
The findings are consistent with research that found differences in the workings of the minds of women and men, said Diane F. Halpern, director of the Berger Institute for Work, Family, and Children and a professor of psychology at Claremont McKenna College in California.
Not set in stone
Halpern said the study "makes a strong link between cognitive behavior and a brain structure that gets activated" when exposed to emotional stimuli.
"It advances our understanding of the link between cognition and the underlying brain structures," she said. "But it doesn't mean that those are immutable, ... that they can't change with experience."
Halpern said the study also supports earlier findings that women have a better autobiographical memory for anything, not just emotional events.
She said the study supports the folkloric idea that a wife has a truer memory for marital spats than does her husband.
"One reason for that is that it has more meaning for women and they process it a little more," said Halpern. "But you can't say that we've found the brain basis for this, because our brains are constantly changing."
In the study, Canli and his colleagues individually tested the emotional memory of 12 women and 12 men using a set of pictures. Some of the pictures were ordinary, and others were designed to evoke strong emotions.
Each of the subjects viewed the pictures and graded them on a three-point scale ranging from "not emotionally intense" to "extremely emotionally intense."
As the subjects viewed the pictures, images were being taken of their brains using magnetic resonance imaging. This identify portions of the brain that are active.
Canli said women and men had distinctively different emotional responses to the same photos. For instance, the men would see a gun and call it neutral, but for women it would be "highly, highly negative" and evoke strong emotions.
Neutral pictures showed such things as a fireplug, a book case or a landscape.
The pictures most often rated emotionally intense showed dead bodies, grave stones and crying people. A picture of a dirty toilet prompted a strong emotional response, especially from the women subjects, Canli said.
All the test subjects returned to the lab three weeks later and were surprised to learn that they would now be asked to remember the pictures they had seen. Canli said they were not told earlier that they would be asked to recall pictures from the earlier session.
In a test tailored for each person, they were asked to pick out pictures that they earlier rated as "extremely emotionally intense." The pictures were mixed among 48 new pictures. Each image was displayed for less than three seconds.
"For pictures that were highly emotional, men recalled around 60 percent and women were at about 75 percent," said Canli.