THE REDUCTION OF SACCADIC LATENCY BY PRIOR OFFSET OF THE FIXATION POINT - AN ANALYSIS OF THE GAP EFFECT

被引:249
作者
REUTERLORENZ, PA [1 ]
HUGHES, HC [1 ]
FENDRICH, R [1 ]
机构
[1] DARTMOUTH COLL,HANOVER,NH 03755
来源
PERCEPTION & PSYCHOPHYSICS | 1991年 / 49卷 / 02期
关键词
D O I
10.3758/BF03205036
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
The latency to initiate a saccade (saccadic reaction time) to an eccentric target is reduced by extinguishing the fixation stimulus prior to the target onset. Various accounts have attributed this latency reduction (referred to as the gap effect) to facilitate sensory processing, oculomotor readiness, or attentional processes. Two experiments were performed to explore the relative contributions of these factors to the gap effect. Experiment 1 demonstrates that the reduction in saccadic reaction time (RT) produced by fixation point offset is additive with the effect of target luminance. Experiment 2 indicates that the gap effect is specific for saccades directed toward a peripheral target and does not influence saccades directed away from the target (i.e., antisaccades) or choice-manual RT. The results are consistent with an interpretation of the gap effect in terms of facilitated premotor processing in the superior colliculus.
引用
收藏
页码:167 / 175
页数:9
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