突现对内源性选择注意的影响

本研究利用空间线索技术的实验模式，考察内源性选择注意与外源性选择注意的相互关系。实验结果表明，外周线索突现可以优先地被加工，但并不是完全高度自动化的；当注意受内源性中央线索引导集中到一个与突现刺激不一致的空间位置时，突现刺激不能引导出自动化的外源性选择注意。

THE RELATION BETWEEN ENDOGENOUS AND EXOGENOUS VISUAL SELECTIVE ATTENTION

One experiment was carried out to investigate therelation between the exogenous and endogenous control of visual selective attention. A centrally locatedcue directed attention to one of several positions Anpreparation for the identification of target letters. Anabrupt onset wasdisplayed near either the target or oneof the distractors. The effectiveness of the central cuewas manipulated to test whether abruptonsets captured attention even when the subjects were in a highlyfocused attention state. Different SOAs (the intervalfrom central cue onsets to abrupt onset ) were appliedto the investigation of the control of endogenous attention. The result showed that when the central arrowhead was available in advance, the focusing of attention prior to display onsets precluded attention attraction to the location of abrupt onsets,a suggestion thatabrupt onsets did not necessarily capture attention inviolation of an observer's intention. It can be arguedthat the abrupt onset does not fulfill the intentionalcriterion of automaticity.