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Differential effects of minified and magnified mirror visual feedback on the underlying misperception of hand size
Attention, Perception, & Psychophysics ( IF 1.7 ) Pub Date : 2021-03-22 , DOI: 10.3758/s13414-021-02262-9
A Treshi-Marie Perera 1, 2 , Jiun Ting Tan 1 , Poo Shin Mu 1 , Roger Newport 3
Affiliation  

Perception of the size of body parts, for instance the hand, has been shown to be distorted in healthy participants, with over- and underestimations of width and length, respectively. Illusory manipulations of body shape and size have highlighted the flexibility of the body representation and have also been found to update immediate perceptions of body size and surrounding objects. Here, we examined whether underlying misperceptions of hand width and length can be modified through exposure to illusory changes in hand size using a mirror visual feedback (MVF) paradigm. While questionnaire responses indicated subjective susceptibility to both magnified and minified manipulations, objective hand size estimates only showed significant differences following exposure to minifying mirrors. These variations might reflect differences in the way that stored representations are accessed or updated in response to size manipulations. Secondly, the findings further reinforce differences between subjective and objective outcomes of illusions on subsequent body perception.



中文翻译:

缩小和放大的镜像视觉反馈对潜在的手部大小错误的不同影响

在健康的参与者中,身体部位(例如手)大小的感知已被扭曲,其宽度和长度分别被高估和低估。对身体形状和大小的虚假操纵突出了身体表示的灵活性,并且还发现它们可以更新对身体大小和周围物体的直接感知。在这里,我们检查了是否可以通过使用镜像视觉反馈(MVF)范式暴露于手的大小的幻觉变化来修正对手的宽度和长度的潜在误解。虽然调查问卷的答复表明对放大和缩小操作都具有主观敏感性,但客观手的大小估计仅显示出在接触缩小镜后才显示出显着差异。这些变化可能反映了响应于大小操作而访问或更新存储的表示形式的方式上的差异。其次,这些发现进一步加强了幻觉的主观和客观结果在随后的身体感知上的差异。

更新日期:2021-03-23
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