Max-Planck-Institute of Human Cognitive and Brain Sciences, Department of Psychology, Leipzig, Germany.
Psychophysiology. 2011 Sep;48(9):1276-83. doi: 10.1111/j.1469-8986.2011.01196.x. Epub 2011 Mar 30.
Numerous studies have shown that the N1 event-related potential (ERP) response is attenuated when it is elicited by self-initiated sounds. This N1 suppression effect is generally interpreted to reflect an internal prediction mechanism, which enables the discrimination of the sensory consequences of our own actions and those of others. The blocked design used in the forerunner studies (i.e., self- and externally initiated sounds presented in different blocks) seriously limits the relevance of these findings, because the N1 effect can simply be explained by contextual task differences. In the present study, self- and externally initiated sounds were mixed within blocks. N1 suppression was found, and its magnitude was even larger than that observed in a traditional blocked condition. This result supports the involvement of an internal prediction mechanism in the discrimination of the sensory consequences of one's own actions and those of others.
大量研究表明，当自我启动的声音引发事件相关电位（ERP）反应时，N1 事件相关电位（ERP）响应会减弱。这种 N1 抑制效应通常被解释为反映一种内部预测机制，使我们能够区分自己行为和他人行为的感觉后果。先驱研究中使用的阻断设计（即，自我和外部启动的声音在不同的块中呈现）严重限制了这些发现的相关性，因为 N1 效应可以简单地通过上下文任务差异来解释。在本研究中，自我和外部启动的声音在块内混合。发现了 N1 抑制，其幅度甚至比传统阻断条件下观察到的还要大。这一结果支持内部预测机制在区分自己行为和他人行为的感觉后果中的参与。
