Chua F K
University of California, Los Angeles.
Percept Psychophys. 1990 Jan;47(1):79-86. doi: 10.3758/bf03208168.
Three identification experiments were completed to disambiguate the associations between spatial frequency and orientation information at the sensory, decisional, and response levels. The stimuli were gratings generated by crossing four levels each of spatial frequency and orientation. In Experiment 1, the subjects made a single identification response to the stimuli. In Experiment 2, two identification responses were made, one for the spatial frequency component and the other for the orientation component. In Experiment 3, the subjects identified either the spatial frequency or the orientation component in any block of trials. The data were confusion matrices, and an information-transmission approach was used to investigate the interactions in the system. The results show that although there were sensory associations, there were no interactions at the decisional level. Performance parity was found: there was no significant difference between the single- and double-judgment paradigms in terms of information transmitted. Overall, the results suggest that although spatial frequency and orientation information is coded jointly at the sensory level, subsequent processing is independent, with each dimension drawing upon different attentional resources.
完成了三项识别实验，以消除在感觉、决策和反应水平上空间频率与方向信息之间关联的歧义。刺激物是通过交叉空间频率和方向的四个水平而生成的光栅。在实验1中，受试者对刺激物做出单一的识别反应。在实验2中，做出两种识别反应，一种针对空间频率成分，另一种针对方向成分。在实验3中，受试者在任何试验块中识别空间频率或方向成分。数据是混淆矩阵，并使用信息传递方法来研究系统中的相互作用。结果表明，虽然存在感觉关联，但在决策水平上没有相互作用。发现了性能均等：在传递的信息方面，单判断和双判断范式之间没有显著差异。总体而言，结果表明，虽然空间频率和方向信息在感觉水平上是联合编码的，但后续处理是独立的，每个维度利用不同的注意力资源。
