Gender and the body size aftereffect

implications for neural processing

Kevin R. Brooks*, Evelyn Baldry, Jonathan Mond, Richard J. Stevenson, Deborah Mitchison, Ian D. Stephen

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)
3 Downloads (Pure)

Abstract

Prolonged exposure to wide (thin) bodies causes a perceptual aftereffect such that subsequently viewed bodies appear thinner (wider) than they actually are. This phenomenon is known as visual adaptation. We used the adaptation paradigm to examine the gender selectivity of the neural mechanisms encoding body size and shape. Observers adjusted female and male test bodies to appear normal-sized both before and after adaptation to bodies digitally altered to appear heavier or lighter. In Experiment 1, observers adapted simultaneously to bodies of each gender distorted in opposite directions, e.g., thin females and wide males. The direction of resultant aftereffects was contingent on the gender of the test stimulus, such that in this example female test bodies appeared wider while male test bodies appeared thinner. This indicates at least some separation of the neural mechanisms processing body size and shape for the two genders. In Experiment 2, adaptation involved either wide females, thin females, wide males or thin males. Aftereffects were present in all conditions, but were stronger when test and adaptation genders were congruent, suggesting some overlap in the tuning of gender-selective neural mechanisms. Given that visual adaptation has been implicated in real-world examples of body size and shape misperception (e.g., in anorexia nervosa or obesity), these results may have implications for the development of body image therapies based on the adaptation model.

Original languageEnglish
Article number1100
Pages (from-to)1-11
Number of pages11
JournalFrontiers in Neuroscience
Volume13
DOIs
Publication statusPublished - 18 Oct 2019

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • adaptation
  • aftereffects
  • body image
  • body size and shape misperception
  • gender
  • neural representation

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