Study On Cognitive Mechanism Of Non-rigid Facial Movement Beneficial Effect

Despite the consistent findings of the non-rigid facial movement beneficial effect, the reason for the effectis less clear. We explore the reason of facial movement facilitation effect by using composite face paradigm.The insights of cognitive mechanism of non-rigid facial movement beneficial effect would be conductive tounderstand facial movement.In this study, we explore cognitive mechanism of non-rigid facial movement beneficial effect throughthree experiments. We analysis composite effect between dynamic faces and static faces in experiment1thatparticipants were asked to learn and recognize the upper face parts of the target composite faces and inexperiment2that participants were asked to learn and recognize the lower face parts of the target compositefaces. In addition，we further examined composite effect between dynamic faces and static faces in experiment3that participants did not know which face part to encode until the familiarization faces disappeared.The experiment results showed the following conclusions.（1） Greater correct recognition of the face part in the non-rigid moving faces than that in the static faceswould suggest involvement of non-rigid facial movement beneficial effect.（2） Non-rigid facial motion facilitates part-based processing, rather than holistic processing, which is thereason of non-rigid facial movement beneficial effect.（3） Non-rigid facial motion facilitates part-based processing, no matter which part of composite face tobe recognized.（4） Non-rigid facial motion facilitates part-based processing, no matter what stage of facial processing tobe told identification task.（5） The part-based facilitation effect occurred at the face retrieval stage.These results taken together suggest that non-rigid facial motion facilitates part-based processing, ratherthan holistic processing, and the part-based facilitation effect occurred at the face retrieval stage.The present findings taken together have important implications for our understanding of the face processing.