Department of Psychology, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom.
School of Psychology, Lincoln University, Lincoln, LN6 7TS, United Kingdom.
Sci Rep. 2017 Nov 17;7(1):15773. doi: 10.1038/s41598-017-15339-z.
A core feature of anorexia nervosa is an over-estimation of body size. However, quantifying this over-estimation has been problematic as existing methodologies introduce a series of artefacts and inaccuracies in the stimuli used for judgements of body size. To overcome these problems, we have: (i) taken 3D scans of 15 women who have symptoms of anorexia (referred to henceforth as anorexia spectrum disorders, ANSD) and 15 healthy control women, (ii) used a 3D modelling package to build avatars from the scans, (iii) manipulated the body shapes of these avatars to reflect biometrically accurate, continuous changes in body mass index (BMI), (iv) used these personalized avatars as stimuli to allow the women to estimate their body size. The results show that women who are currently receiving treatment for ANSD show an over-estimation of body size which rapidly increases as their own BMI increases. By contrast, the women acting as healthy controls can accurately estimate their body size irrespective of their own BMI. This study demonstrates the viability of combining 3D scanning and CGI techniques to create personalised realistic avatars of individual patients to directly assess their body image perception.
神经性厌食症的一个核心特征是对体型的高估。然而，由于现有的方法在用于判断体型的刺激物中引入了一系列人为因素和不准确性，因此对这种高估进行量化一直存在问题。为了解决这些问题，我们：(i)对 15 名患有神经性厌食症（下文简称 ANSD）症状的女性和 15 名健康对照女性进行了 3D 扫描，(ii)使用 3D 建模软件包从扫描中构建化身，(iii)操纵这些化身的体型，以反映出基于生物计量学的、连续的体重指数（BMI）变化，(iv)使用这些个性化化身作为刺激物，让女性估计自己的体型。结果表明，目前正在接受 ANSD 治疗的女性对体型存在高估，而且这种高估会随着自身 BMI 的增加而迅速增加。相比之下，作为健康对照组的女性可以准确估计自己的体型，而不受自身 BMI 的影响。这项研究证明了结合 3D 扫描和 CGI 技术创建个体化患者的真实化身来直接评估他们的身体形象感知的可行性。
