FIXATION-POINT OFFSETS REDUCE THE LATENCY OF SACCADES TO ACOUSTIC TARGETS

被引:36
作者
FENDRICH, R [1 ]
HUGHES, HC [1 ]
REUTERLORENZ, PA [1 ]
机构
[1] DARTMOUTH COLL,HANOVER,NH 03755
来源
PERCEPTION & PSYCHOPHYSICS | 1991年 / 50卷 / 04期
关键词
D O I
10.3758/BF03212231
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
If an observer's fixation point is extinguished just prior to the onset of a peripheral target, the latency to saccade to that target is reduced. We show that this "gap effect" is not specific to visual targets. Observers made saccades to a light flash or to a white-noise burst. A warning tone was presented on every trial to control for the possible warning effect of the fixation-point offset. For both target modalities, saccade latencies were significantly reduced when the fixation point was extinguished 200 msec prior to the target onset. Implications of this outcome for interpretations of the gap effect are considered. It is argued that the presence of a gap effect for tones, in conjunction with previous findings, is consistent with the hypothesis that the gap effect is produced by a facilitation of premotor processes in the superior colliculus.
引用
收藏
页码:383 / 387
页数:5
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