Department of Psychology, Harvard University, 33 Kirkland Street, Cambridge, MA 02138, USA.
Psychiatry Res. 2013 May 15;207(1-2):45-52. doi: 10.1016/j.psychres.2012.11.022. Epub 2012 Dec 28.
Psychosis and psychosis-proneness are associated with abnormalities in subjective experience of the self, including distortions in bodily experience that are difficult to study experimentally due to lack of structured methods. In 55 healthy adults, we assessed the relationship between self-reported psychosis-like characteristics and susceptibility to the rubber hand illusion of body ownership. In this illusion, a participant sees a rubber hand being stroked by a brush at the same time that they feel a brush stroking their own hand. In some individuals, this creates the bodily sense that the rubber hand is their own hand. Individual differences in positive (but not negative) psychosis-like characteristics predicted differences in susceptibility to experiencing the rubber hand illusion. This relationship was specific to the subjective experience of rubber hand ownership, and not other unusual experiences or sensations, and absent when a small delay was introduced between seeing and feeling the brush stroke. This indicates that individual differences in susceptibility are related to visual-tactile integration and cannot be explained by differences in the tendency to endorse unusual experiences. Our findings suggest that susceptibility to body representation distortion by sensory information may be related or contribute to the development of psychosis and positive psychosis-like characteristics.
精神病和精神病倾向与自我主观体验的异常有关，包括身体体验的扭曲，由于缺乏结构化的方法，这些扭曲很难进行实验研究。在 55 名健康成年人中，我们评估了自我报告的类精神病特征与易感性之间的关系橡胶手错觉的身体所有权。在这种错觉中，参与者看到一只橡胶手被刷子刷，同时他们感觉到刷子在刷自己的手。在某些人身上，这会产生一种身体上的感觉，即橡胶手是他们自己的手。积极（但非消极）类精神病特征的个体差异预测了对体验橡胶手错觉的易感性差异。这种关系是针对橡胶手所有权的主观体验的，而不是针对其他不寻常的体验或感觉，并且当在看到和感觉到刷子strokes 之间引入小延迟时，这种关系就不存在了。这表明，易感性的个体差异与视觉触觉整合有关，不能用倾向于认可不寻常体验的差异来解释。我们的研究结果表明，对感官信息的身体表现扭曲的易感性可能与精神病和阳性类精神病特征的发展有关或有贡献。
