Liao Hsin-I, Yeh Su-Ling
Department of Psychology, Institute of Brain and Mind Sciences, Center for Neurobiology and Cognitive Science, National Taiwan University, Taipei, Taiwan.
Acta Psychol (Amst). 2011 Sep;138(1):52-9. doi: 10.1016/j.actpsy.2011.05.005. Epub 2011 Jun 8.
The issue whether attentional capture is determined by top-down factors or can be stimulus-driven remains unsolved. To examine this, we used a spatial cueing paradigm with set size four and eight in which a color target is preceded by an uninformative cue (color or onset) that either matches or does not match the target-defining feature. The critical manipulation lies in adding no-cue trials to make the subsequent first with-cue trial unexpected, which reveals the stimulus-driven component. For the onset cue, the first-trial analysis indicated attentional capture at set size four and eight, whereas results from the average data indicated attentional capture at set size eight but not at set size four. For the color cue, attentional capture was found in the average data but not in the first trial, regardless of set size. These results can be explained by the interactive processing of early stimulus-driven activation followed by top-down modulation.
注意力捕获是由自上而下的因素决定还是可以由刺激驱动这一问题仍未解决。为了研究这一点，我们使用了一种空间线索范式，线索集大小为4和8，其中在颜色目标之前有一个无信息线索（颜色或起始点），该线索与定义目标的特征匹配或不匹配。关键的操作在于添加无线索试验，使随后的第一次有线索试验出乎意料，从而揭示刺激驱动成分。对于起始点线索，首次试验分析表明在线索集大小为4和8时存在注意力捕获，而平均数据的结果表明在线索集大小为8时存在注意力捕获，而在线索集大小为4时不存在。对于颜色线索，无论线索集大小如何，在平均数据中发现了注意力捕获，但在首次试验中未发现。这些结果可以通过早期刺激驱动激活随后进行自上而下调制的交互处理来解释。
