Influence of intrasexual competition and internalisation of the thin ideal on eating disorders and binge eating disorder

Penklis, Hannah S. (2013). Influence of intrasexual competition and internalisation of the thin ideal on eating disorders and binge eating disorder Honours Thesis, School of Psychology, The University of Queensland.

       
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Author Penklis, Hannah S.
Thesis Title Influence of intrasexual competition and internalisation of the thin ideal on eating disorders and binge eating disorder
School, Centre or Institute School of Psychology
Institution The University of Queensland
Publication date 2013-10-09
Thesis type Honours Thesis
Supervisor Dr Shelli Dubbs
Total pages 81
Language eng
Subjects 1701 Psychology
Abstract/Summary Female intrasexual competition was investigated to determine if it had a predictive effect on eating disorders and binge eating disorder. Additionally, a forced choice scenario was utilised to identify if intrasexual competition resulted in different levels of positivity towards females of a lower or higher BMI. Participants included 334 females (M = 31.12, SD = 11.60 years) from Australia and the USA and completed an online survey. Intrasexual competition was measured on a continuous scale. Depression, stress, anxiety and perfectionism, known predictors of eating disorders, were also measured and controlled for. Participants were also shown two bodies of differing BMIs and asked to rate their positivity towards them. It was found that participants higher in intrasexual competition were also higher in disordered eating behaviours and cognitions, and intrasexual competition predicted this above and beyond known predictors. Intrasexual competition was also found to be a predictor of binge eating behaviours, but not above and beyond other known predictors. Results showed that participants higher in intrasexual competition rated the higher BMI body significantly less positively than those lower in intrasexual competition. There was no difference in positivity towards the lower BMI condition, regardless of where participants sat on the intrasexual competition scale. Overall, the lower BMI body was preferred regardless of intrasexual competition. Internalisation of the thin ideal is a significant predictor of disordered eating, and as such may link intrasexual competition and disordered eating further. Findings of this study remain tentative as the results were not found using a clinical sample, and as such, intrasexual competition can only be said to predict disordered eating behaviours and cognitions, and binge eating behaviours. Results also showed that females higher in intrasexual competition will display higher internalisation of the thin ideal and less positivity for higher BMI bodies.
Keyword Intrasexual competition
Internalisation
Thin ideal
Eating disorders
Binge eating disorder

 
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Created: Fri, 04 Jul 2014, 20:01:43 EST by Danico Jones on behalf of School of Psychology