Jolicoeur P, Dell'Acqua R
Department of Psychology, University of Waterloo, ON, Canada.
Psychon Bull Rev. 2000 Sep;7(3):472-9. doi: 10.3758/bf03214359.
The purpose of the experiments was to constrain the locus of interference in the attentional blink (AB) paradigm. Two visual stimuli, T1 and T2, were shown 300 msec apart, and each was followed by a mask. T1 was an "H," an "S," an "&," or a blank field; T2 consisted of five letters. In Task1, blank fields and & characters could be ignored, whereas Hs and Ss had to be identified and reported. Task2 was always to report as many letters as possible from T2. Task2 performance was lower when T1 had to be reported, as expected from the attentional blink phenomenon (AB). The exposure duration of T2 was also manipulated. More letters could be reported as exposure duration was increased. However, this effect was additive with manipulations of Task1 processing load that produced the AB effect. Log-linear analyses assuming that effects of T2 exposure duration and Task1 load effects occur at functionally distinct stages of processing provided satisfactory fits to the results, suggesting that none of the AB effect occurs as early as those of T2 exposure duration. The results suggest that the locus of the AB effect is later than the stage(s) of processing affected by exposure duration.
这些实验的目的是确定注意瞬脱（AB）范式中干扰的位置。两个视觉刺激，T1和T2，相隔300毫秒呈现，每个刺激之后都有一个掩蔽。T1是一个“H”、一个“S”、一个“&”或一个空白区域；T2由五个字母组成。在任务1中，空白区域和“&”字符可以忽略，而“H”和“S”必须被识别并报告。任务2总是尽可能多地报告T2中的字母。当必须报告T1时，任务2的表现会降低，这正如注意瞬脱现象（AB）所预期的那样。T2的呈现持续时间也受到了操控。随着呈现持续时间的增加，可以报告更多的字母。然而，这种效应与产生AB效应的任务1处理负荷的操控是相加的。假设T2呈现持续时间的效应和任务1负荷效应发生在功能上不同的处理阶段的对数线性分析对结果提供了令人满意的拟合，这表明AB效应没有一个像T2呈现持续时间的效应那样早出现。结果表明，AB效应的位置比受呈现持续时间影响的处理阶段更靠后。
