Abstract

An experiment is reported that manipulated movement distance, movement time and the availability of vision (Light-On versus Light-Off) on the accuracy of aimed hand movements. There was a constant difference in spatial accuracy between Light-On and Light-off conditions as a function of distance when the duration of the movement was 200 msec; when the duration of the aimed hand movement was 400 or 600 msec the difference in spatial accuracy between Light-On and Light-Off conditions increased as distance increased. These results were taken as support for a two-process model of visual feedback processing in aimed hand movements, and provide converging evidence for the rapid visual feedback processing results of Zelaznik, Hawkins, and Kisselburgh (1983).