Psychology Department, University of York, York, United Kingdom.
Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden.
PLoS One. 2018 Jun 21;13(6):e0199426. doi: 10.1371/journal.pone.0199426. eCollection 2018.
Dissatisfaction with one's body is a widespread issue in modern society and has been linked to vulnerability for developing eating disorders. Recent studies have demonstrated a direct relationship between body perception and body satisfaction by manipulating perceived body size using multisensory body illusions. However, how these body size illusions influence implicit affective experience has not previously been examined. The current experiment used an established full-body ownership illusion paradigm to induce feelings of illusory obesity in male and female participants. The effects of illusory obesity on explicit and implicit body satisfaction were measured in naïve participants across two separate experiments. In terms of explicit measures, owning an obese body decreased body satisfaction, and owning a slimmer body increased body satisfaction in females but not in males. However, implicit feelings regarding the body were only influenced by the synchrony of the touch and not the size of the body in the illusion. These results suggest that implicit and explicit affective experiences of the body may be mediated by different factors. In addition, these findings may have clinical implications because both implicit and explicit changes in affective experience of the body were related to behaviours and thoughts associated with disordered eating in a non-clinical sample.
对身体的不满是现代社会中一个普遍存在的问题，并且与易患饮食失调的脆弱性有关。最近的研究表明，通过使用多感觉身体错觉来操纵感知的身体大小，身体知觉和身体满意度之间存在直接关系。然而，这些身体大小错觉如何影响内隐情感体验以前尚未被研究过。当前的实验使用了一种已建立的全身所有权错觉范式，在男性和女性参与者中诱导出虚幻肥胖的感觉。在两个单独的实验中，对天真的参与者进行了虚幻肥胖对明确和内隐身体满意度的影响的测量。在明确的测量方面，拥有肥胖的身体会降低身体满意度，而拥有更苗条的身体会增加女性的身体满意度，但不会增加男性的身体满意度。但是，对身体的内隐感觉仅受错觉中触摸的同步性影响，而不受身体大小的影响。这些结果表明，身体的内隐和外显情感体验可能受到不同因素的影响。此外，这些发现可能具有临床意义，因为在非临床样本中，身体的内隐和外显情感体验的变化都与与饮食失调有关的行为和思想有关。
