辨别作业难度对返回抑制时间进程的影响

在返回抑制范式下，利用线索一靶子模式和辨别作业进行了两个实验，探讨辨别作业难度对返回抑制的影响。以大学生为被试。实验一对辨别作业难度采用组间设计；实验二采用组内设计。结果发现，无论是组间比较(实验一)，还是组内比较(实验二)．复杂辨别作业条件下返回抑制出现时间均比简单辨别作业晚，表明作业难度对返回抑制的时间进程有显著影响。该结果对返回抑制的机制研究有一定的意义。

The Effect of Discrimination-Task Difficulty on the Time Course of IOR

By means of the cue-target method with discrimination tasks, two experiments were conducted to explore the effect of discrimination-task difficulty on Inhibition of Return (IOR). College students were tested. A between-group design was employed to compare the effects of different discrimination difficulties in Experiment 1, and within-group was employed in Experiment 2. The results showed that, both under the condition of between-group comparison ( Experiment 1) and under the condition of within-group comparison (Experiment 2) , IOR appeared later in difficult discrimination tasks than in easy tasks. The results suggested that the difficulty of discrimination tasks had an effect on the time course of IOR. The results are meaningful to the study of the mechanism of IOR in the Translation-Inhibition Theory.