Estimating the size of bodies is crucial for interactions with physical and social environments. Body-size perception is malleable and can be altered using visual adaptation paradigms. However, it is unclear whether such visual adaptation effects also transfer to other modalities and influence, for example, the perception of tactile distances. In this study, we employed a visual adaptation paradigm. Participants were exposed to images of expanded or contracted versions of self- or other-identity bodies. Before and after this adaptation, they were asked to manipulate the width of body stimuli to appear as ‘normal’ as possible. We replicated an effect of visual adaptation such that the body-size selected as most ‘normal’ was larger after exposure to expanded and thinner after exposure to contracted adaptation stimuli. In contrast, we did not find evidence that this adaptation effect transfers to distance estimates for paired tactile stimuli delivered to the abdomen. A Bayesian analysis showed that our data provide moderate evidence that there is no effect of visual body-size adaptation on the estimation of spatial parameters in a tactile task. This suggests that visual body-size adaptation effects do not transfer to somatosensory body-size representations.

中文翻译：

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视觉体型适应和触觉距离估计

估计身体的大小对于与物理和社会环境的交互至关重要。身体大小的感知是可塑的，可以使用视觉适应范式来改变。然而，尚不清楚这种视觉适应效果是否也会转移到其他方式和影响，例如触觉距离的感知。在这项研究中，我们采用了视觉适应范式。参与者接触到自我或其他身份身体的扩展或收缩版本的图像。在这种适应之前和之后，他们被要求操纵身体刺激的宽度，使其看起来尽可能“正常”。我们复制了视觉适应的效果，这样选择为最“正常”的体型在暴露于膨胀后更大，在暴露于收缩适应刺激后更薄。相比之下，我们没有发现证据表明这种适应效应转移到传递到腹部的成对触觉刺激的距离估计。贝叶斯分析表明，我们的数据提供了适度的证据，表明视觉体型适应对触觉任务中空间参数的估计没有影响。这表明视觉体型适应效应不会转移到体感体型表征。