Conci Markus, Müller Hermann J
Allgemeine und Experimentelle Psychologie, Department Psychologie, Ludwig-Maximilians Universität München, Leopoldstr. 13, D-80802 Munich, Germany.
Atten Percept Psychophys. 2009 Nov;71(8):1725-38. doi: 10.3758/APP.71.8.1725.
When two targets (T1 and T2) are inserted into a rapid serial visual presentation (RSVP) stream of nontargets, observers are impaired at identifying T2 when it is presented within half a second after T1. This transient drop in performance, or attentional blink (AB), has been attributed to a temporary unavailability of task-critical processing resources. In the present study, we investigated how object-based attention modulates the AB, by presenting four synchronized RSVP streams in the corners of two rectangular bars (e.g., one above and one below fixation). The results from four experiments revealed that the AB increased within short temporal lags (of up to ~400 msec) when T2 was presented on the same, rather than a different, bar as T1 (with T1-T2 spatial distance controlled for). Thus, the AB is seen to spread across entire object groupings, suggesting that the spatiotemporal resolution of attention is modulated by global-object information.
当两个目标（T1和T2）插入到非目标的快速序列视觉呈现（RSVP）流中时，如果T2在T1之后半秒内呈现，观察者识别T2的能力会受损。这种表现的短暂下降，即注意瞬脱（AB），被归因于任务关键处理资源的暂时不可用。在本研究中，我们通过在两个矩形条的角上呈现四个同步的RSVP流（例如，一个在注视点上方，一个在注视点下方），研究了基于对象的注意如何调节注意瞬脱。四个实验的结果表明，当T2与T1呈现在同一根条上而非不同的条上时（同时控制T1-T2的空间距离），注意瞬脱在短时间滞后（高达约400毫秒）内会增加。因此，可以看到注意瞬脱会在整个对象分组中扩散，这表明注意的时空分辨率受到全局对象信息的调节。
