Peylo Charline, Sterner Elisabeth F, Zeng Yifan, Friedrich Elisabeth V C
Department of Psychology / Research Unit Biological Psychology, Ludwig-Maximilians-Universität München, Munich, 80802 Bavaria, Germany.
Department of Diagnostic and Interventional Neuroradiology / School of Medicine, Technical University of Munich, Munich, 81675 Bavaria, Germany.
iScience. 2023 Jul 11;26(8):107297. doi: 10.1016/j.isci.2023.107297. eCollection 2023 Aug 18.
Communicative actions from one person are used to predict another person's response. However, in some cases, these predictions can outweigh the processing of sensory information and lead to illusory social perception such as seeing two people interact, although only one is present (i.e., seeing a Bayesian ghost). We applied either inhibitory brain stimulation over the left premotor cortex (i.e., real TMS) or sham TMS. Then, participants indicated the presence or absence of a masked agent that followed a communicative or individual gesture of another agent. As expected, participants had more false alarms in the communicative (i.e., Bayesian ghosts) than individual condition in the sham TMS session and this difference between conditions vanished after real TMS. In contrast to our hypothesis, the number of false alarms increased (rather than decreased) after real TMS. These pre-registered findings confirm the significance of the premotor cortex for social action predictions and illusory social perception.
一个人的交际行为被用来预测另一个人的反应。然而，在某些情况下，这些预测可能会超过感官信息的处理，并导致虚幻的社会感知，比如尽管只出现了一个人，但却看到两个人在互动（即看到贝叶斯幽灵）。我们对左侧运动前皮层施加抑制性脑刺激（即真正的经颅磁刺激）或伪经颅磁刺激。然后，参与者指出是否存在一个被掩盖的主体，该主体跟随另一个主体的交际或个体手势。正如预期的那样，在伪经颅磁刺激实验中，参与者在交际（即贝叶斯幽灵）条件下比在个体条件下有更多的误报，并且在真正的经颅磁刺激后，条件之间的这种差异消失了。与我们的假设相反，真正的经颅磁刺激后误报的数量增加了（而不是减少了）。这些预先注册的研究结果证实了运动前皮层对社会行为预测和虚幻社会感知的重要性。
