Changes in the perceived size of the body following exposure to distorted self-body images

被引:2
|
作者
D'Amour, Sarah [1 ]
Alexe, Deborah [1 ]
Harris, Laurence R. [1 ]
机构
[1] York Univ, Ctr Vis Res, Toronto, ON, Canada
来源
ROYAL SOCIETY OPEN SCIENCE | 2022年 / 9卷 / 04期
基金
加拿大自然科学与工程研究理事会;
关键词
body representation; body perception; visual system; adaptation; perceptual size distortion; multisensory integration; VISUAL DISTORTION; ADAPTATION; SHAPE; REPRESENTATION; PAIN; VALIDATION; PERCEPTION; VIEWPOINT; BMI;
D O I
10.1098/rsos.210722
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Inaccurate perceptions, such as under- or over-estimation of body size are often found in clinical eating disorder populations but have recently been shown also in healthy people. However, it is not yet clear how body size perception may be affected when the internal body representation is manipulated. In this study, visual adaptation was used to investigate whether exposure to distorted visual feedback alters the representation of body size and how long any such effects might last. Participants were exposed for five minutes to a distorted life-size image of themselves that was either 20% wider or 20% narrower than their normal size. Accuracy was measured using our novel psychophysical method that taps into the implicit body representation. The accuracy of the representation was assessed at 6, 12 and 18 min following exposure to adaptation. Altered visual feedback caused changes in participants' judgements of their body size: adapting to a wider body resulted in size overestimation whereas underestimations occurred after adapting to a narrower body. These distortions lasted throughout testing and did not fully return back to normal within 18 min. The results are discussed in terms of the emerging literature indicating that the internal representation of the body is dynamic and flexible.
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页数:10
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