Visual encoding of patterns is subject to dual-task interference
Visual encoding of patterns is subject to dual-task interference
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DOI：
10.3758/bf03213798
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发表时间：
2000-03-01
影响因子：
2.4
通讯作者：
Jolicoeur, P
中科院分区：
文献类型：
--
作者：
Dell'Acqua, R;Jolicoeur, P
两个刺激以不同的刺激开始异步（soa）呈现，每个刺激与一个不同的任务相关。第一个刺激是两个或三个频率之一的音调。在两种情况下，与音调相关的任务要么是基于音调的快速两选辨别（2AD），要么是基于音调的快速三选辨别（3AD）。在第三种情况下，受试者被告知忽略语气。第二个刺激是一个短暂暴露的红色和黑色方块的研究矩阵，然后是一个面具。在固定的延迟后，掩模被与研究矩阵相同或不同的测试矩阵所取代。与矩阵相关的任务是指出，在没有速度压力的情况下，研究矩阵和测试矩阵是相同还是不同。结果表明，随着音调与学习矩阵之间的SOA减小，受试者在矩阵任务中的准确性降低。这种效应在3AD音调任务中比2AD音调任务更大。此外，在每一种快速AD条件下，音调任务中的RTs时间越长，矩阵任务的准确性就越低。当受试者被告知忽略语气时，这些影响都不明显。这些结果表明，编码视觉信息可能受到跨模态多任务所施加的显著容量限制。
Two stimuli were presented at varying stimulus onset asynchronies (SOAs), with each stimulus associated with a distinct task. The first stimulus was a tone at one of either two or three frequencies. In two conditions, the task associated with a tone was either a speeded two-alternative discrimination (2AD), or a speeded three-alternative discrimination (3AD) based on the pitch of the tone. In a third condition, subjects were told to ignore the tone. The second stimulus was a briefly exposed study matrix of red and black squares followed by a mask. After a fixed delay, the mask was replaced by a test matrix that was either the same or different from the study matrix. The task associated with the matrices was to indicate, with no speed pressure, whether the study matrix and the test matrix were the same or different. Results from each speeded AD condition showed that subject's accuracy in the matrix task decreased as the SOA between the tone and the study matrix decreased. This effect was larger for the 3AD tone task than with a 2AD tone task. In addition, within each speeded AD condition, longer RTs in the tone task were associated with lower accuracy in the matrix task. None of these effects was evident when the subjects were told to ignore the tone. These results suggest that encoding visual information can be subject to significant capacity limitations imposed by cross-modal multitasking.