Flögel Mareike, Kalveram Karl Theodor, Christ Oliver, Vogt Joachim
Work and Engineering Psychology Research Group, Technische Universität Darmstadt, Darmstadt, Germany.
Institute of Experimental Psychology, University of Duesseldorf, Darmstadt, Germany.
Psychol Res. 2016 Mar;80(2):298-306. doi: 10.1007/s00426-015-0650-4. Epub 2015 Feb 6.
The "rubber hand illusion (RHI)" is a perceptual illusion, which allows the integration of artificial limbs into the body representation of a person by means of combined visual and tactile stimulation. The illusion has been frequently replicated but always concerning the upper limbs. The present study verified an analog illusion that can be called the "rubber foot illusion" (RFI). In a conjoint experiment using both a rubber hand and a rubber foot, brushstrokes were applied to the respective real and rubber limb placed alongside the real one. However, only the artificial limb's handling was visible. The brushstrokes were given either synchronously, with a delay of ±0.5 s, or without tactile stimulation of the real limb. Questionnaire data and the proprioceptive drift towards the rubber limb (determined by calling on the subjects to show where they locate their unseen limb) defined the illusion strength. Results revealed that the illusion was induced in both limbs with comparable strength, but only in the synchronous condition.
“橡胶手错觉（RHI）”是一种感知错觉，它通过视觉和触觉刺激的结合，使人将人造肢体整合到自身的身体表征中。这种错觉经常被复制，但一直只涉及上肢。本研究证实了一种类似的错觉，可称为“橡胶脚错觉”（RFI）。在一项同时使用橡胶手和橡胶脚的联合实验中，沿着真实肢体放置的真实肢体和橡胶肢体都受到了笔触刺激。然而，只有对人造肢体的操作是可见的。笔触刺激要么同步进行，延迟±0.5秒，要么不对真实肢体进行触觉刺激。问卷数据以及朝向橡胶肢体的本体感觉漂移（通过要求受试者指出他们看不见的肢体的位置来确定）定义了错觉强度。结果显示，在同步条件下，两种肢体都能以相当的强度诱发错觉。
