Dell'Acqua R, Pascali A, Jolicoeur P, Sessa P
Department of Human Sciences and Center for Neuroscience, University of Ferrara, Via Savonarola 38, 44100 Ferrara, Italy.
Vision Res. 2003 Aug;43(18):1907-13. doi: 10.1016/s0042-6989(03)00308-0.
When two target stimuli (T1 and T2) are presented sequentially within half a second of each other, identification accuracy is often poor for T2. This phenomenon, known as attentional blink (AB), can be observed generally only if the stimulus terminating the presentation of T2 acts as an interruption mask. Recent evidence suggests that even four small dots surrounding a target item can exert masking effects, provided the target onset occurs at an unattended spatial location. In order to test whether an AB could be observed under conditions of four-dot masking of T2, five rapid serial visual presentation streams of letters were synchronously displayed on each trial of the present experiment. T1 and T2 were digits presented at unpredictable locations and unpredictable temporal intervals. T2 was followed by either a blank field, a letter, or four-dots. No AB was observed when T2 was not masked, but robust and equally sized ABs were observed when T2 was followed by both the letter mask and the four-dots.
当两个目标刺激（T1和T2）在彼此半秒内相继呈现时，T2的识别准确率通常较低。这种现象被称为注意瞬脱（AB），通常只有当终止T2呈现的刺激作为中断掩蔽时才能观察到。最近的证据表明，即使围绕目标项目的四个小点也能产生掩蔽效应，前提是目标开始出现在未被注意的空间位置。为了测试在T2的四点掩蔽条件下是否能观察到AB，在本实验的每次试验中同步显示五个快速序列视觉呈现的字母流。T1和T2是出现在不可预测位置和不可预测时间间隔的数字。T2之后要么是空白字段，要么是一个字母，要么是四个点。当T2未被掩蔽时未观察到AB，但当T2之后是字母掩蔽和四个点时，观察到了强烈且大小相等的AB。
