Journal
PSYCHOLOGY AND AGING
Volume 19, Issue 4, Pages 649-667Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0882-7974.19.4.649
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Funding
- NIA NIH HHS [AG15-19195] Funding Source: Medline
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Can dual-task practice remove age-related differences in the psychological refractory period (PRP) effect? To answer this question, younger and older individuals practiced 7 blocks of a PRP design, in which Task 1 (T1) required a vocal response to an auditory stimulus and Task 2 (T2) required a manual response to a visual stimulus (Experiment 1). The results showed that practice did not reduce, but rather increased, age-related differences in PRP interference. Using the trained individuals, the introduction of a less complex new T1 (Experiment 2) or a less complex new T2 (Experiment 3) with the task previously practiced reduced the PRP interference but only in older adults. The authors propose that older adults suffer from a large task-switch cost that is more sensitive to task complexity than to the amount of practice.
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