New College, 33578, Sarasota, Florida.
Mem Cognit. 1976 Nov;4(6):763-8. doi: 10.3758/BF03213246.
The nature of processing demands during a letter-match task was investigated in an extension of the Posner and Boies (1971) paradigm. In Experiment I, a visual probe was employed in addition to an auditory probe in two different experimental conditions. The shape of the auditory probe reaction time (RT) function was similar to that found by Posner and Boies. However, in contrast to their findings, RT was greatly increased shortly after presentation of the first letter for the visual probe function. It was concluded that perceptual as well as postperceptual limitations on processing capacity exist. A second experiment provided further support for this hypothesis.
在 Posner 和 Boies（1971）范式的扩展中，研究了字母匹配任务中的处理需求的本质。在实验 1 中，除了听觉探针外，还使用了视觉探针，在两种不同的实验条件下。听觉探针反应时间（RT）函数的形状与 Posner 和 Boies 的发现相似。然而，与他们的发现相反，当视觉探针函数呈现第一个字母后，RT 会大大增加。得出的结论是，处理能力存在知觉和知觉后限制。第二个实验为这个假设提供了进一步的支持。
