Stelmach L B, Herdman C M
Communications Research Centre, Ottawa, Ontario, Canada.
J Exp Psychol Hum Percept Perform. 1991 May;17(2):539-50. doi: 10.1037//0096-1523.17.2.539.
The present research examined the effects of directed attention on speed of information transmission in the visual system. Ss judged the temporal order of 2 stimuli while directing attention toward 1 of the stimuli or away from both stimuli. Perception of temporal order was influenced by directed attention: Given equal onset times, the attended stimulus appeared to occur before the unattended stimulus. Direction of attention also influenced the perception of simultaneity. The findings support the notion that attention affects the speed of transmission of information in the visual system. To account for the pattern of temporal order and simultaneity judgments, a model is proposed in which the temporal profile of visual responses is affected by directed attention.
本研究考察了定向注意对视觉系统中信息传递速度的影响。被试在将注意力指向其中一个刺激或远离两个刺激的同时，判断两个刺激的时间顺序。定向注意会影响时间顺序的感知：在起始时间相同的情况下，被注意的刺激似乎比未被注意的刺激先出现。注意方向也会影响同时性的感知。这些发现支持了注意会影响视觉系统中信息传递速度这一观点。为了解释时间顺序和同时性判断的模式，提出了一个模型，其中视觉反应的时间轮廓受定向注意的影响。
