生物运动知觉对于人类生存和社交有重要作用，因此人类在进化中获得了卓越地识别生物运动的能力。近来研究表明即便在无意识下生物运动亦可得到加工，且其功能表现在于能够外源性定向注意，该功能是人类适应性行为的重要体现。然而无意识下生物运动的外源定向机制尚未见探讨。.生物运动加工涉及多个水平，其中包含两个关键子过程：基于整体结构的加工和基于局部运动的加工。诸多研究证实两者在生物运动知觉中有着不同作用。本项目拟采用持续闪烁抑制技术将生物运动刺激置于无意识下，并结合行为、眼动追踪和事件相关电位三种手段来系统考察整体结构和局部运动在不可见生物运动诱发外源性注意定向中的作用。如果两者作用不同，那么它们的注意定向效应在三种指标上应不同；如果作用相同，三种指标应无差异。.对上述问题的探讨，不仅可以揭示不可见生物运动的外源定向机制，丰富和完善生物运动信息加工理论，还可为自闭症疑似患者的诊断提供新思路与新方法。

Biological motion perception plays an important role in human survival and social interaction, thus recognizing biological motions ought to be a remarkable ability acquired by human beings during the evolution process. Recent evidence has shown that biological motion can be unconsciously processed (Faivre & Kock, 2014). One function of unconscious processing of biological motion is to be able to automatically trigger attentional orienting (Sun et al., 2017), which is an important embodiment of human adaptive behavior. However, little is known about the mechanisms of exogenous attentional orienting triggered by invisible biological motion. .As a multilevel process, biological motion perception includes two key sub-processes: global configuration and local motion. They play different roles in biological motion perception. In order to systematically explore the roles of global configuration and local motion of invisible biological motion in exogenous attentional orienting, this project plans to suppress biological motion into unawareness using continuous flash suppression technique, and to record participants’ orienting response, eye tracking indices and event-related potentials. If the global configuration and local motion play different roles in the exogenous attentional orienting induced by invisible biological motion, the attentional orienting effects triggered by them will be significantly different. If they play the same role，the attentional orienting effects triggered by them will not be significantly different. .In general, deep understanding about the mechanisms of exogenous attentional orienting triggered by invisible biological motion, can not only enrich and improve the theory of biological motion information processing, but also provide new insights and potential methods for the diagnosis of suspected autism patients.