Kalckert Andreas, Bico Ian, Fong Jia Xi
University of Reading Malaysia, Iskandar Puteri, Malaysia.
Perception. 2019 May;48(5):447-455. doi: 10.1177/0301006619839286. Epub 2019 Apr 2.
The rubber hand illusion is a perceptual illusion of perceiving an object like a model hand as part of the own body. The question whether the illusion can be induced with noncorporal objects that do not look like a human body part is not perfectly resolved yet. In this study, we directly assessed the subjective experience of two different components within the illusion (i.e., ownership and referral of touch) when a model hand and a balloon are stimulated. We observed significantly stronger illusion ratings for the hand as compared with the balloon, and only the hand ratings showed a clear affirmation of the illusion. We further conclude that (a) a significant difference between synchronous and asynchronous conditions may not be sufficient to argue for the successful induction of the illusion and (b) the subcomponents show a different pattern in the different conditions, which may lead to alternative interpretations. These observations call for a more fine-grained interpretation of questionnaire data in rubber hand illusion studies.
橡皮手错觉是一种将类似模型手的物体感知为自身身体一部分的感知错觉。关于这种错觉是否能由不像人体部位的非实体物体诱发的问题尚未得到完美解决。在本研究中，当对模型手和气球进行刺激时，我们直接评估了错觉中两个不同成分（即触觉的归属和转移）的主观体验。我们观察到，与气球相比，手的错觉评分显著更高，并且只有手部评分明确证实了错觉的存在。我们进一步得出结论：(a) 同步和异步条件之间的显著差异可能不足以证明错觉的成功诱发；(b) 子成分在不同条件下呈现出不同的模式，这可能导致不同的解释。这些观察结果要求在橡皮手错觉研究中对问卷数据进行更细致的解读。
