The orienting of attention has been found to be influenced by the previous cueing status in a spatial-cueing paradigm. The explanation for this sequence effect remains uncertain. This study separated the involuntary and the voluntary components of arrow cueing by manipulating the predicted target locations. For example, a left arrow cue may have indicated that the target was more likely to appear at the up location. Therefore, three trial types were repeated or switched between trials: cued (targets appeared along the direction of the arrows), predicted (targets appeared at the locations predicted by the arrows), and unrelated (targets appeared at the other two locations, neither cued nor predicted). RTs of cued trials were found to be significantly facilitated after a previous cued trial; however, the same effect was not observed for predicted trials. The results suggest that significant sequence effects are induced only in the involuntary component of arrow cueing. The findings support the feature-integration hypothesis for the sequence effect of symbolic cueing.
通过两个实验,探讨空间工作记忆负载对中央注视线索引发返回抑制(inhibition of return,IOR)的影响。实验一通过再认面孔的相似度来控制与中央注视线索相关的空间工作记忆任务负载,结果发现,高任务负载条件下出现IOR,低任务负载条件下中央注视线索促进搜索;实验二在实验一高任务负载的基础上加入与注视线索无关的空间工作记忆任务,结果发现,仅在与注视线索无关的空间工作记忆负载低的条件下出现IOR。结果表明,中央注视线索引发的IOR受到空间工作记忆资源的限制,中央注视线索只有在获得足够的资源时才能引发IOR。注视线索获得空间工作记忆资源多少决定中央注视线索能否引发IOR。 相似文献