Shapiro Kimron, Schmitz Frank, Martens Sander, Hommel Bernhard, Schnitzler Alfons
University of Wales, Bangor, Wales, UK.
Neuroreport. 2006 Feb 6;17(2):163-6. doi: 10.1097/01.wnr.0000195670.37892.1a.
Humans have difficulty processing more than one event at a time, as is evidenced by the attentional blink ('blink') phenomenon: the second of two targets in a visual stream of events cannot be reported accurately if it appears between 100 and 500 ms after the first. By using whole-head magnetoencephalography, we show that the probability of behaviourally failing to correctly identify the second target can be predicted from the amount of attentional resources devoted to processing the first target, as indexed by T1 activation. This important finding supports resource sharing accounts of divided attention tasks such as the 'blink'; that is, such tasks may reflect an individual processing strategy rather than an immutable structural processing bottleneck.
人类一次处理多个事件存在困难，注意力瞬脱（“瞬脱”）现象就证明了这一点：在一系列视觉事件中，如果第二个目标出现在第一个目标之后100到500毫秒之间，就无法准确报告。通过使用全头式脑磁图，我们发现，行为上未能正确识别第二个目标的概率，可以根据用于处理第一个目标的注意力资源量来预测，以T1激活为指标。这一重要发现支持了诸如“瞬脱”等注意力分散任务的资源共享理论；也就是说，此类任务可能反映的是个体的处理策略，而非不可改变的结构性处理瓶颈。
