施动感是自我意识的一个重要部分。意向捆绑即人的动作及动作的感觉结果两者的时间点主观上被感知为相互靠近的现象,为研究人类的施动感提供了一个重要的测量手段。本文综述意向捆绑的实验范式和认知机制,发现目前线索整合理论能最好的解释意向捆绑现象。意向捆绑的范式可以用于临床疾病和跨文化的研究。今后还应深入研究意向捆绑机制及意向拥绑与施动感的关系。
Human agency manifests itself as influencing the external world through its own actions. Measuring sense of agency (SoA) is a challenge for research of human agency. Haggard et al. (2002) found that there is a temporal attraction between voluntary action and its sensory consequence. This so-called "intentional binding" (IB) has served as an important tool for quantifying SoA. This paper reviews its research paradigms and cognitive mechanism. In studies of IB, there are two main experimental methods -- Libet's clock method and the interval estimation method. Libet's clock method measures the timing perception of action and sensory consequence separately when participants report their timing judgment with the aid of viewing a fast-rotating clock. The interval estimation method directly records the subject-reported interval between action and sensory consequence. Some researchers proposed that to use cognitive process to account for IB, it has to answer how the CNS establishes causality between voluntary action and sensory consequence. There were two different theories - the predictive inference theory and the retrospective inference theory. Predictive inference theory assumes that the CNS predicts the sensory consequence of action and establishes causality if the prediction matches the actual consequence. The retrospective inference theory argues that the CNS infers the causality after it receives the sensory feedback. Researchers found that both of them contributed to the timing perception of action in I13. However, there is no evidence for the timing perception of sensory consequence in IB and the details of their joint contribution are not clear. According to the cue integration theory, the timing shift is a result of integration of the action cue and the sensory consequence cue. Final readout of the CNS is based on weighted integration of cues where the weight of each cue is inversely related to its reliability. The more reliable the cue is, the more weight it has. Thus, this theory can exp