Enhanced motion aftereffect for complex motions


Bex PJ, Metha AB, Makous W. Enhanced motion aftereffect for complex motions. Vision Research [Internet]. 1999;39 :2229–38.


We measured the magnitude of the motion after effect ({MAE)} elicited by gratings viewed through four spatial apertures symmetrically positioned around fixation. The gratings were identical except for their orientations, which were varied to form patterns of global motion corresponding to radiation, rotation or translation. {MAE} magnitude was estimated by three methods: the duration of the {MAE;} the contrast required to null the {MAE} and the threshold elevation for detecting an abrupt jump. All three techniques showed that {MAEs} for radiation and rotation were greater than those for translation. The greater adaptability of radiation and rotation over translation also was observed in areas of the display where no adapting stimulus had been presented. We also found that adaptation to motion in one direction had equal effects on sensitivity to motion in the same and opposite directions.