Body size over-estimation in women with anorexia nervosa is not qualitatively different from female controls.

Cornelissen, Piers, Johns, Anna and Tovee, Martin (2013) Body size over-estimation in women with anorexia nervosa is not qualitatively different from female controls. Body Image, 10 (1). pp. 103-11. ISSN 1740-1445

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Official URL: http://dx.doi.org/10.1016/j.bodyim.2012.09.003

Abstract

Over-estimation of body size is a cardinal feature of anorexia nervosa (AN), usually revealed by comparing individuals who have AN with non-AN individuals, the inference being that over-estimation is pathological. We show that the same result can be reproduced by sampling selectively from a single distribution of performance in body size judgement by comparing low BMI individuals with normal BMI individuals. Over-estimation of body size in AN is not necessarily pathological and can be predicted by normal psychophysical biases in magnitude estimation. We confirm this prediction in a dataset from a morphing study in which 30 women with AN and 137 control women altered a photograph of themselves to estimate their actual body size. We further investigated the relative contributions of sensory and attitudinal factors to body-size overestimation in a sample of 166 women. Our results suggest that both factors play a role, but their relative importance is task dependent.

Item Type: Article
Uncontrolled Keywords: Anorexia nervosa, body size over-estimation, body mass index
Subjects: B100 Anatomy, Physiology and Pathology
C800 Psychology
Department: Faculties > Health and Life Sciences > School of Life Sciences > Psychology
Depositing User: Ay Okpokam
Date Deposited: 05 Mar 2013 10:26
Last Modified: 10 Aug 2015 11:32
URI: http://nrl.northumbria.ac.uk/id/eprint/11333

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