The properties of object representations constructed during visual search in natural scenes |
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Authors: | Kazuya Inoue Yuji Takeda |
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Institution: | 1. Department of Integrated Psychological Science, Kwansei Gakuin University, Hyogo, Japank-inoue@kwansei.ac.jp;3. Cognition and Action Group, National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan |
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Abstract: | To investigate properties of object representations constructed during a visual search task, we manipulated the proportion of trials/task within a block: In a search-frequent block, 80% of trials were search tasks; remaining trials presented a memory task; in a memory-frequent block, this proportion was reversed. In the search task, participants searched for a toy car (Experiments 1 and 2) or a T-shape object (Experiment 3). In the memory task, participants had to memorize objects in a scene. Memory performance was worse in the search-frequent block than in the memory-frequent block in Experiments 1 and 3, but not in Experiment 2 (token change in Experiment 1; type change in Experiments 2 and 3). Experiment 4 demonstrated that lower performance in the search-frequent block was not due to eye-movement behaviour. Results suggest that object representations constructed during visual search are different from those constructed during memorization and they are modulated by type of target. |
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Keywords: | Short-term memory Object recognition Visual search |
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