Search for multiple targets: Evidence for memory-based control of attention |
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Authors: | Email author" target="_blank">Yuji?TakedaEmail author |
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Institution: | Visual Cognition Group, Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan. yuji-takeda@aist.go.jp |
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Abstract: | There are two opposing models with regard to the function of memory in visual search: a memorydriven model and a memory-free
model. Recently, Horowitz and Wolfe (2001) investigated a multipletarget search task. Participants were required to decide
whether or not there were at leastn targets present. They demonstrated that the reaction time ×n function has a positive and accelerated curve. They argued that the memory-free model predicts this curve, whereas the memory-driven
model predicts a linear function. In this study, I varied the total set sizes of a multiple-target search task and fitted
the models separately for eachn condition. The model fit indicated that the memory-driven model is more appropriate than the memory-free model in eachn condition. These results suggest that an amnesic process does not cause the positive accelerated curve of the reaction time
×n function but that it is the result of the time needed to examine each additionaln item. |
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Keywords: | |
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