A distance effect in a manual aiming task to remembered targets: a test of three hypotheses.

摘要: It has been noted that manual aiming error and variability when pointing to remembered targets increase as a function of target eccentricity. In the present study we evaluated which one three hypotheses (target localization, motor, or movement duration) best explains this 'distance effect'. experiment 1, older younger participants aimed with their unseen hand at location distributed between 129 309 mm from starting base. Target presentation time was either 50 500 ms movements could be initiated following 100- 10,000-ms recall delay. Participants had no constraints concerning were asked reach near in longer than farther targets. The results revealed significant distance effect imposed but showed significantly reversed instructions far same obtained regardless time, delay, age participants. These supported duration interpretation effect. 2, replicated one's toward did not take place visible Taken together these suggest prolonged execution interferes stored egocentric representation.