INFLUENCE OF MOVEMENT SPEED ON ACCURACY OF POINTING TO MEMORIZED TARGETS IN 3D SPACE

Subjects performed three-dimensional (3D) pointing movements as accura tely as possible with their eyes closed under four different speed con ditions: 'slow', 'normal', 'fast' and 'maximal' (peak velocities of 0. 62, 1.61, 2.51 and 4.68 m/s, respectively). Movement speed did not sig nificantly affect the magnitude of constant pointing errors, nor that of variable errors, except for movements in the 'maximal' condition wh en peak velocity values larger than 4.5 m/s were reached. The findings are consistent with the hypothesis that final arm position may be spe cified regardless of movement dynamics.