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Psychophysics reveals a right hemispheric contribution to body image distortions in women but not men.

Abstract：

:We tested the hypothesis that the right cerebral hemisphere contributes to the enhanced body image distortions seen in women when compared to men. Using classical psychophysics, 60 right-handed healthy participants (30 women) were briefly presented with size-distorted pictures of themselves, another person (an experimenter), and a non-corporal, familiar object (a coke bottle) to the central, right, and left visual field. Participants had to decide whether the presented stimulus was fatter or thinner than the real body/object, and thus compare the presented picture with the stored representation of the stimulus from memory. From these data we extracted the amount of image distortion at which participants judged the various stimuli to be veridical. We found that right visual field presentations (initial left hemisphere processing) revealed a general "fatter" bias, which was more evident for bodies than for objects. Crucially, a "fatter" bias with own body presentations in the left visual field (initial right hemisphere processing) was only found for women. Our findings suggest that right visual field presentation results in a general size overestimation, and that this overestimation is more pronounced for bodies than for objects. Moreover, the particular "fatter" bias after own body presentations to the left visual field in women supports the notion of a specific role of the right hemisphere in sex-specific body image distortion.

journal_name

Neuropsychologia

journal_title

Neuropsychologia

authors

Mohr C,Porter G,Benton CP

doi

10.1016/j.neuropsychologia.2007.06.001

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

2942-50

issue

13

eissn

0028-3932

issn

1873-3514

pii

S0028-3932(07)00218-7

journal_volume

45

pub_type

杂志文章

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