Transsaccadic integration of biological motion.

In a transsaccadic integration paradigm, Ss had to detect saccade-contingent changes in a moving point-light walker. First, the nature of the object representation surviving a saccade was examined. The low detection of changes in the image-plane position of the figure and the high detection of changes in the upright walker's in-depth orientation indicated that transsaccadic object representations are position invariant but orientation dependent. Implications for object recognition are highlighted. The second issue concerned transsaccadic anticipation of the future event course. Ss anticipated the postsaccadic relative positions of the walker's body parts. In contrast, there was no anticipation of the postsaccadic absolute position of a translating figure; instead, Ss relied on memory of the figure's presaccadic position. The anticipated in-depth orientation of a rotating walker seemed to be distorted in the direction of canonical views.