We investigated the effects of non-informative vision of the body on exteroceptive multisensory integration and touch perception in participants presenting with different levels of eating disorder (ED) symptoms. The study employed a sample of women reporting low (low ED; n = 31) vs high (high ED; n = 34) levels of subclinical ED symptoms who undertook the Somatic Signal Detection task (SSDT). During the SSDT, participants are required to detect near-threshold tactile stimulation at their fingertip with and without a simultaneous light flash next to the stimulated fingertip. Previous research has found that participants have a tendency to erroneously report touch sensations in the absence of the stimulation, and especially when the light flash is presented. In this study, participants completed the SSDT under two conditions: while their hand was visible (non-informative vision), and while their hand was hidden from sight (no vision). Non-informative vision of the hand was found to have a different effect on SSDT performances according to participants’ levels of ED symptoms. High ED participants were better able to correctly detect the touch during the SSDT when their hand was visible. Conversely, for low ED participants, vision of the body was linked to a greater effect of the light in inducing false reports of touch. We suggest that in those with high ED symptoms, vision of the body may exacerbate a predisposition to focusing on external rather than internal bodily information.

我们调查了身体的非信息性视觉对呈现不同程度饮食失调 (ED) 症状的参与者的外部感觉多感觉整合和触觉感知的影响。该研究采用了报告低（低 ED；n  = 31）与高（高 ED；n = 34) 承担体细胞信号检测任务 (SSDT) 的亚临床 ED 症状水平。在 SSDT 期间，参与者需要在他们的指尖检测接近阈值的触觉刺激，在受刺激的指尖旁边有或没有同时闪光。先前的研究发现，参与者倾向于在没有刺激的情况下错误地报告触觉，尤其是在出现闪光时。在这项研究中，参与者在两种情况下完成了 SSDT：当他们的手是可见的（非信息性视觉）时，以及当他们的手被隐藏在视线之外（没有视觉）。根据参与者的 ED 症状水平，发现手的非信息视觉对 SSDT 表现有不同的影响。当他们的手可见时，高 ED 参与者能够更好地在 SSDT 期间正确检测到触摸。相反，对于低 ED 参与者，身体的视觉与光在诱发错误的触摸报告方面的更大影响有关。我们建议，在那些具有高度 ED 症状的人中，身体视觉可能会加剧关注外部而不是内部身体信息的倾向。