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Published on: October 19, 2014
Adult age differences in visual search accuracy: attentional guidance and target detectability
D J Madden1, L R Gottlob, P A Allen
1Center for the Study of Aging and Human Development and Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina 27710, USA. djm@geri.duke.edu
Psychology and Aging
|January 13, 2000
Summary
Older adults show a decline in target detectability during difficult visual search tasks. However, both younger and older adults effectively use attentional guidance to improve search efficiency, indicating preserved perceptual attentional abilities.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Aging Research
Background:
- Previous studies on visual search efficiency primarily used reaction times with high accuracy.
- Attentional guidance to subsets of items enhances visual search for both younger and older adults.
Purpose of the Study:
- To investigate attentional guidance in visual search under conditions of low accuracy, focusing on perceptual processes.
- To determine age-related differences in visual search when performance is not at ceiling.
Main Methods:
- Conjunction search tasks were employed with accuracy well below ceiling.
- Signal-detection modeling was used to analyze performance in the most difficult search condition.
Main Results:
- Older adults were more likely to miss targets in conjunction search compared to younger adults, beyond generalized slowing.
- Both age groups demonstrated improved search efficiency by attending to specific item subsets.
- Signal-detection analysis revealed age-related decline in target detectability.
Conclusions:
- Attentional guidance to perceptual features in visual search does not decline with age.
- Age differences in difficult visual search tasks are partly explained by reduced target detectability in older adults.
