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Body image estimations in 86 normal-weight adolescent girls showed (a) a tendency to overestimate body width and underestimate body length and (b) an association between the younger ages and the extent of overestimation of body width. In particular there is a sharp drop in overestimation between ages 10 and 11 and thereafter a more gradual and non-significant decline. These age-specific normative data are useful in assessing body image distortions in a variety of medical and psychiatric disorders.
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Halmi et al. (1977) studied this question.
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