Characteristics of Viewpoint Aftereffects

Abstract

We can identify an objects independently of the viewpoints. Studies of 3D shape constancy have shown the visual system has object recognition mechanism that has relatively narrow tuning to viewpoints. There is a phenomenon called a viewpoint aftereffect that is related to such a viewpoint-variant process (Fang, F. & He, S. Neuron, 45, 793-800, 2005). The viewpoint aftereffect is a phenomenon where the direction of a face appears to be shifted after observing the same face in a angle. We investigated the viewpoint aftereffect with several conditions and found the results that suggest that the effect is indeed related to object perception.