Age Differences in Feature Search as a Function of Exposure Duration

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Abstract
Older and younger observers searched for two targets embedded in response-compatible or -incompatible distractors. Display duration was varied across trial blocks from 26 to 1,664 ms. For both age groups, response-incompatible displays led to relatively poorer accuracy, particularly at brief durations. Age differences in accuracy were larger for response-incompatible displays and diminished at longer durations, an effect that was also revealed in the latency data. Results are interpreted within a continuous-flow conceptualization of visual processing and are consistent with the hypothesis that older adults are slowed in the feature extraction process that underlies visual search.

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