期刊
COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE
卷 9, 期 2, 页码 202-215出版社
SPRINGER
DOI: 10.3758/CABN.9.2.202
关键词
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资金
- University of Newcastle Research Grants Committee
- University of Newcastle Human Research Ethics Committee
- Australian Postgraduate Award
- University of Newcastle
Task-switching studies show no behavioral benefit of partially informative cues. However, ERP evidence of an early cue-locked positivity elicited by both fully and partially informative cues suggests that both cues trigger an anticipatory component of task set reconfiguration (Nicholson, Karayanidis, Davies, & Michie, 2006). We examined this apparent discrepancy using a cued-trials task-switching paradigm with three tasks. The ERP finding of an early cue-locked positivity was replicated for both switch-to cues, which validly predicted an up-coming switch trial and specified the new task set, and switch-away cues, which validly predicted an up-coming switch trial but not the new task set. This component was not elicited by a noninformative cue that did not specify whether the task would switch or repeat. Switch-away cues resulted in more accurate but not faster responding than did noninformative cues. Modeling of decision processes confirmed a speed-accuracy trade-off between these conditions and a preparation benefit for both switch-to and switch-away cues. These results indicate that both fully and partially informative cues elicit an early anticipatory component of task set reconfiguration that is reflected in the early cue-locked positivity. We argue that the pattern of results is most consistent with a task set inhibition account of this early anticipatory component of task set reconfiguration.
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