Selective attention in motion perception

The effects of selective attention on the duration of motion aftereffects were examined for investigating the hierarchical structure in a motion processing system. In the psychophysical experiments, the human subjects were adapted to each of the various kinds of motion, such as simple translation, expansion, contraction and rotation, and they carried out a concurrent task of alphanumeric discrimination, which required voluntary selective attention. The results showed that the selective attention did not reduce the duration of the motion aftereffects caused by the expansion/contraction/rotation, though it was affected by the simple translation