School of Psychology, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
Conscious Cogn. 2010 Dec;19(4):986-98. doi: 10.1016/j.concog.2010.04.005. Epub 2010 May 10.
The ability to distinguish between our own actions and those of an external agent is a fundamental component of normal human social interaction. Both low- and high-level mechanisms are thought to contribute to the sense of movement agency, but the contribution of each is yet to be fully understood. By applying small and incremental perturbations to realistic visual feedback of the limb, the influence of high-level action intentions and low-level motor predictive mechanisms were dissociated in two experiments. In the first, participants were induced to claim agency over movements that were subject to large perturbations and to deny agency over self-produced unperturbed movements despite the application of motor corrections by low-level mechanisms. A control experiment confirmed that if reaches met with their intended goal then they were more likely to be attributed to the agent, regardless of the discrepancy between the actual and seen positions of the limb.
区分自身行为和外部代理行为的能力是正常人类社会互动的基本组成部分。低水平和高水平机制都被认为对运动代理感有贡献，但每种机制的贡献尚不完全清楚。通过对肢体的真实视觉反馈施加小的增量扰动，可以在两个实验中分离高水平动作意图和低水平运动预测机制的影响。在第一个实验中，参与者被诱导对受到大扰动的运动声称具有代理权，而对自身产生的未受扰动的运动否认具有代理权，尽管低水平机制施加了运动校正。一项对照实验证实，如果到达目标，那么无论肢体的实际和看到的位置之间存在差异，它们更有可能归因于代理。
