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Effects of exposure to bodies of different sizes on perception of and satisfaction with own body size: two randomized studies.

ABSTRACT: Body dissatisfaction is prevalent among women and associated with subsequent obesity and eating disorders. Exposure to images of bodies of different sizes has been suggested to change the perception of 'normal' body size in others. We tested whether exposure to different-sized (otherwise identical) bodies changes perception of own and others' body size, satisfaction with body size and amount of chocolate consumed. In Study 1, 90 18-25-year-old women with normal BMI were randomized into one of three groups to complete a 15?min two-back task using photographs of women either of 'normal weight' (Body Mass Index (BMI) 22-23?kg?m-2), or altered to appear either under- or over-weight. Study 2 was identical except the 96 participants had high baseline body dissatisfaction and were followed up after 24?h. We also conducted a mega-analysis combining both studies. Participants rated size of others' bodies, own size, and satisfaction with size pre- and post-task. Post-task ratings were compared between groups, adjusting for pre-task ratings. Participants exposed to over- or normal-weight images subsequently perceived others' bodies as smaller, in comparison to those shown underweight bodies (p?

SUBMITTER: Bould H

PROVIDER: S-EPMC5990741 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Effects of exposure to bodies of different sizes on perception of and satisfaction with own body size: two randomized studies.

Bould Helen H Carnegie Rebecca R Allward Heather H Bacon Emily E Lambe Emily E Sapseid Megan M Button Katherine S KS Lewis Glyn G Skinner Andy A Broome Matthew R MR Park Rebecca R Harmer Catherine J CJ Penton-Voak Ian S IS Munafò Marcus R MR

Royal Society open science 20180509 5

Body dissatisfaction is prevalent among women and associated with subsequent obesity and eating disorders. Exposure to images of bodies of different sizes has been suggested to change the perception of 'normal' body size in others. We tested whether exposure to different-sized (otherwise identical) bodies changes perception of own and others' body size, satisfaction with body size and amount of chocolate consumed. In Study 1, 90 18-25-year-old women with normal BMI were randomized into one of th ...[more]

PMID: 29892352

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Project description:The social valorisation of overweight in African populations could promote high-risk eating behaviours and therefore become a risk factor of obesity. However, existing scales to assess body image are usually not accurate enough to allow comparative studies of body weight perception in different African populations. This study aimed to develop and validate the Body Size Scale (BSS) to estimate African body weight perception.Anthropometric measures of 80 Cameroonians and 81 Senegalese were used to evaluate three criteria of adiposity: body mass index (BMI), overall percentage of fat, and endomorphy (fat component of the somatotype). To develop the BSS, the participants were photographed in full face and profile positions. Models were selected for their representativeness of the wide variability in adiposity with a progressive increase along the scale. Then, for the validation protocol, participants self-administered the BSS to assess self-perceived current body size (CBS), desired body size (DBS) and provide a "body self-satisfaction index." This protocol included construct validity, test-retest reliability and convergent validity and was carried out with three independent samples of respectively 201, 103 and 1115 Cameroonians.The BSS comprises two sex-specific scales of photos of 9 models each, and ordered by increasing adiposity. Most participants were able to correctly order the BSS by increasing adiposity, using three different words to define body size. Test-retest reliability was consistent in estimating CBS, DBS and the "body self-satisfaction index." The CBS was highly correlated to the objective BMI, and two different indexes assessed with the BSS were consistent with declarations obtained in interviews.The BSS is the first scale with photos of real African models taken in both full face and profile and representing a wide and representative variability in adiposity. The validation protocol proved its reliability for estimating body weight perception in Africans.

Dataset Information

Effects of exposure to bodies of different sizes on perception of and satisfaction with own body size: two randomized studies.

Publications

Effects of exposure to bodies of different sizes on perception of and satisfaction with own body size: two randomized studies.

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