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via ScienceDirect Publication: Vision Research on 3/21/11
Publication year: 2011Source: Vision Research, In Press, Accepted Manuscript, Available online 21 March 2011
Grayden J.F., Solman , J., Allan Cheyne , Daniel, Smilek
Participants' eye movements were monitored while they searched for a target among a varying number of distractors either with or without a concurrent memory load. Consistent with previous findings, adding a memory load slowed response times without affecting search slopes; a finding normally taken to imply that memory load affects pre- and/or post-search processes but not the search process itself. However, when overall response times were decomposed using eye movement data into pre-search (e.g., initial encoding), search, and post-search (e.g., response selection) phases, analysis revealed that adding a memory load affected all phases, including the search phase. In addition, we...
Highlights: ► In visual search, slopes relating response times to set size are not exhaustive measures of the search process. ► Main effects in visual search response times contain elements in pre-search processes, post-search processes, and during actual search time. ► Non-spatial memory loads during visual search lead to selection of fixations landing farther from search items, and to more frequent revisiting of previously inspected locations than during search without load.
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