Fahey Samira, Charette Lyndsey, Francis Christine, Zheng Zane
Social Sciences Department.
Can J Exp Psychol. 2018 Dec;72(4):244-252. doi: 10.1037/cep0000152. Epub 2018 Aug 20.
Multisensory integration is considered a crucial mechanism underlying the sense of body ownership, but the everyday experience of feeling our own bodies seems automatic and effortless, which implies that the process of integrating multisensory signals for bodily self-awareness may require minimal cognitive effort. To test this, we developed an n-back rubber-hand illusion. The n-back component refers to tracking the identity of the rubber-hand fingers being stroked as the illusion is induced. This embedded n-back task allowed us to parametrically manipulate the levels of cognitive load while maintaining the integrity of the rubber-hand illusion. Across two experiments, we show that the strength of hand embodiment is sensitive only to the multisensory congruency of signals (as elicited by the finger stroking on the rubber hand) but not to the increasingly higher load placed on the performance of the n-back tasks. These results suggest that multisensory representation of self is robust to cognitive depletion and requires minimal effort. (PsycINFO Database Record (c) 2018 APA, all rights reserved).
多感官整合被认为是身体所有权感背后的关键机制，但我们感受自己身体的日常体验似乎是自动且毫不费力的，这意味着将多感官信号整合以形成身体自我意识的过程可能只需要极少的认知努力。为了验证这一点，我们开发了一种n-back橡皮手错觉。n-back部分是指在诱发错觉时追踪被抚摸的橡皮手手指的身份。这个嵌入式n-back任务使我们能够在保持橡皮手错觉完整性的同时，对认知负荷水平进行参数化操作。在两个实验中，我们表明手部具身化的强度仅对信号的多感官一致性（如橡皮手上的手指抚摸所引发的）敏感，而对n-back任务执行中不断增加的更高负荷不敏感。这些结果表明，自我的多感官表征对认知耗竭具有鲁棒性，并且只需要极少的努力。（PsycINFO数据库记录（c）2018美国心理学会，保留所有权利）
