Examining inhibition of return with multiple sequential cues in younger and older adults

Studies with younger adults have shown that when multiple peripheral cues are presented sequentially, inhibition of return (IOR) occurs at several locations with the greatest IOR at the most recently cued location and the least at the earliest cued location. The inhibitory ability needed to tag multiple locations requires visuospatial working memory, and it is thought that this type of memory may be vulnerable to the effects of aging. The present experiments examined whether older adults would show less IOR at multiple cued locations than younger adults when placeholders were present (Experiment 1) and absent (Experiment 2). Of interest, in both experiments older adults showed an almost identical pattern of IOR, in both magnitude and number of inhibited locations, to that of younger adults. This finding, in conjunction with research on memory-guided saccades, suggests that there may be a form of visuospatial working memory, specific to oculomotor and visual attention processes, that is relatively resistant to the effects of aging.