Department of History, Society and Human Studies, University of Salento, Lecce, Italy.
Department of Psychology, University of Milano-Bicocca, Milan, Italy.
Q J Exp Psychol (Hove). 2023 Oct;76(10):2197-2207. doi: 10.1177/17470218231156849. Epub 2023 Mar 7.
In the rubber hand illusion (RHI), participants see a fake hand touched synchronously with their real hand, which is hidden from view. The three-way interaction between vision, touch, and proprioception induces the sensation that the dummy hand belongs to oneself (i.e., subjective embodiment) and the illusory displacement of the real hand towards the fake one (i.e., proprioceptive drift). In the literature, there are mixed results (some positive and some null) regarding the existence of a relationship between subjective embodiment and proprioceptive drift. We conducted a Bayesian meta-analysis to tackle this issue quantitatively. Evidence strongly favours the presence of a correlation between subjective embodiment and proprioceptive drift, supporting the model proposed by Botvinick and Cohen in 1998. However, the correlation is around .35, a value suggesting that the two indices capture different facets of the RHI. This result clarifies the association between the illusory effects produced by the RHI and may be helpful for designing studies having appropriate statistical power.
在橡胶手错觉（RHI）中，参与者看到一只假手与他们的真实手同步触摸，而真实手被隐藏在视线之外。视觉、触觉和本体感觉的三向相互作用会引起一种感觉，即假手属于自己（即主观体现），并且真实手向假手的虚幻位移（即本体感觉漂移）。在文献中，关于主观体现和本体感觉漂移之间是否存在关系存在混合结果（有些为阳性，有些为阴性）。我们进行了贝叶斯元分析来对此问题进行定量研究。有强有力的证据表明主观体现和本体感觉漂移之间存在相关性，这支持了 Botvinick 和 Cohen 在 1998 年提出的模型。然而，相关性约为.35，这表明这两个指标捕捉到了 RHI 的不同方面。这个结果澄清了 RHI 产生的虚幻效果之间的关联，并且可能有助于设计具有适当统计功效的研究。
