冗余信号效应与全身幻觉:受幻觉影响的不是多感官触觉刺激,而是单感官触觉刺激。

IF 1.8 4区 心理学 Q3 BIOPHYSICS
Lieke M J Swinkels, Harm Veling, Hein T van Schie
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引用次数: 0

摘要

在全身幻觉(FBI)过程中,参与者会体验到自我位置向一个身体的变化,他们从第三人称视角看到这个身体就在面前,并体验到触觉来自这个身体。多感官整合被认为是这种错觉的基础。在本研究中,我们测试了冗余信号效应(RSE),这是一种新的客观幻觉测量方法,旨在直接探究幻觉背后的多感官整合。幻觉由一名实验者诱发,实验者抚摸和轻拍参与者的肩膀和腋下,参与者则通过头戴式显示器感知面前虚拟身体上的触摸。受试者进行了一项快速检测任务,对虚拟人身上的视觉刺激、真实人身上的触觉刺激以及视觉和触觉的综合(多感官)刺激做出反应。通过种族模型不等式测试对 RSE 进行的分析表明,多感官整合在同步和异步条件下都发生了。这一惊人的发现表明,即使在没有诱发幻觉的情况下,来自不同(视觉和触觉)模式的同步身体刺激也会短暂地整合到多感官表征中。此外,这一发现还表明,RSE 并不是衡量身体错觉的合适客观指标。但有趣的是,在加速检测任务中,对单感触觉刺激的反应在异步条件下比在同步条件下更慢,方差也更大。本文讨论了这一发现对身体表征文献的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Redundant Signals Effect and the Full Body Illusion: not Multisensory, but Unisensory Tactile Stimuli Are Affected by the Illusion.

During a full body illusion (FBI), participants experience a change in self-location towards a body that they see in front of them from a third-person perspective and experience touch to originate from this body. Multisensory integration is thought to underlie this illusion. In the present study we tested the redundant signals effect (RSE) as a new objective measure of the illusion that was designed to directly tap into the multisensory integration underlying the illusion. The illusion was induced by an experimenter who stroked and tapped the participant's shoulder and underarm, while participants perceived the touch on the virtual body in front of them via a head-mounted display. Participants performed a speeded detection task, responding to visual stimuli on the virtual body, to tactile stimuli on the real body and to combined (multisensory) visual and tactile stimuli. Analysis of the RSE with a race model inequality test indicated that multisensory integration took place in both the synchronous and the asynchronous condition. This surprising finding suggests that simultaneous bodily stimuli from different (visual and tactile) modalities will be transiently integrated into a multisensory representation even when no illusion is induced. Furthermore, this finding suggests that the RSE is not a suitable objective measure of body illusions. Interestingly however, responses to the unisensory tactile stimuli in the speeded detection task were found to be slower and had a larger variance in the asynchronous condition than in the synchronous condition. The implications of this finding for the literature on body representations are discussed.

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来源期刊
Multisensory Research
Multisensory Research BIOPHYSICS-PSYCHOLOGY
CiteScore
3.50
自引率
12.50%
发文量
15
期刊介绍: Multisensory Research is an interdisciplinary archival journal covering all aspects of multisensory processing including the control of action, cognition and attention. Research using any approach to increase our understanding of multisensory perceptual, behavioural, neural and computational mechanisms is encouraged. Empirical, neurophysiological, psychophysical, brain imaging, clinical, developmental, mathematical and computational analyses are welcome. Research will also be considered covering multisensory applications such as sensory substitution, crossmodal methods for delivering sensory information or multisensory approaches to robotics and engineering. Short communications and technical notes that draw attention to new developments will be included, as will reviews and commentaries on current issues. Special issues dealing with specific topics will be announced from time to time. Multisensory Research is a continuation of Seeing and Perceiving, and of Spatial Vision.
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