重复知盲:刺激呈现时间及作业对反应时的影响

本研究用汉字材料及反应时的数据来探讨重复知盲现象及有关机制。在实验一中，被试必须判断快速连续呈现的两个字究竟是否包含两个或是只有一个动物字。结果显示在７０毫秒时，有重复知盲现象（重复动物字组比非重复动物字组的反应时为长）；在１００毫秒时则无；另外，在２００毫秒时则有重复启动现象产生（重复动物字组比非重复动物字组的反应时为短）。实验二采用同样的材料及呈现方法，但被试只需要判断以７０毫秒呈现之实验材料中的第二个字是否动物字。结果发现类似重复启动的现象，这些结果显示，呈现时间与作业是决定重复刺激究竟造成知盲或启动效应的重要因素。本文另外还讨论本研究的方法与结果对了解重复刺激心理加工的可能贡献。

REPETITION BLINDNESS:EFFECTS OF DISPLAY DURATION AND TASK ON RESPONSE LATENCIES

Two experiments were carried out to explore repetition blindness and related mechanisms. In Experiment 1 , subjects were asked to judge whether or not two rapidly and sequentially presented Chinese characters involved one or two animal characters. When the display rate was 70ms per item, longer response times were found in the repeated-character condition relative to the unrepeated condition, whereasa reversed pattem was found whem the display rate was 200ms per item .The same procedure and materials were adopted in Expedient 2 with a fixed display rate (i. e., 70ms per item). The task was to decide whether or not the second character in each sequence represented an animal . The repetition blindness pattem was not found, but a repetition priming trend was shown. The results collectively indicate that both display duration and task are important determinants of repetition blindness. Implications of the present methodology and results on the processing of repeatedly presented stimuli are also discussed.