Researchers from the University of Notre Dame in US presented college-age women with a series of photos of either noticeably thin or noticeably overweight women.
The women in the photos engaged in either "fat talk" or positive body talk; the participants were then asked to rate the women on various dimensions, including how likeable they were.
The women in the photos were rated significantly less likeable when they made "fat talk" statements about their bodies, whether or not they were overweight.
"Though it has become a regular part of everyday conversation, 'fat talk' is far from innocuous," said lead author Alexandra Corning, research associate professor of psychology and director of Notre Dame's Body Image and Eating Disorder Lab.
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"It is strongly associated with, and can even cause, body dissatisfaction, which is a known risk factor for the development of eating disorders," Corning said.
Although fat talk has been thought of by psychologists as a way women may attempt to initiate and strengthen their social bonds, the new research finds that fat-talkers are liked less than women who make positive statements about their bodies.