Weller Lisa, Schwarz Katharina A, Kunde Wilfried, Pfister Roland
Department of Psychology, Julius Maximilians University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany.
Department of Psychology, Julius Maximilians University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany.
Biol Psychol. 2017 Feb;123:241-249. doi: 10.1016/j.biopsycho.2016.12.015. Epub 2016 Dec 23.
Sensory stimuli resulting from one's own actions are perceptually attenuated compared to identical but externally produced stimuli. This may enable the organism to discriminate between self-produced events and externally produced events, suggesting a strong link between sensory attenuation and a subjective sense of agency. To investigate this supposed link, we compared the influence of filled and unfilled action-effect delays on both, judgements of agency for self-produced sounds and attenuation of the event-related potential (ERP). In line with previous findings, judgments of agency differed between both delay conditions with higher ratings for filled than for unfilled delays. Sensory attenuation, however, was not influenced by filling the delay. These findings indicate a partial dissociation of the two phenomena.
与相同但由外部产生的刺激相比，由自身动作产生的感觉刺激在感知上会减弱。这可能使有机体能够区分自身产生的事件和外部产生的事件，表明感觉减弱与主观能动性之间存在紧密联系。为了研究这种假定的联系，我们比较了有填充和无填充的动作-效果延迟对自身产生声音的能动性判断以及事件相关电位（ERP）减弱的影响。与之前的研究结果一致，在两种延迟条件下，能动性判断存在差异，有填充延迟的评分高于无填充延迟。然而，感觉减弱不受延迟填充的影响。这些发现表明这两种现象部分分离。
