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Immediate versus delayed control demands elicit distinct mechanisms for instantiating proactive control
Jacqueline R Janowich1, James F Cavanagh2
1Department of Psychology, University of New Mexico, Albuquerque, NM, USA. jackijanowich@gmail.com.
Cognitive, Affective & Behavioral Neuroscience
|January 5, 2019
Summary
Timing influences cognitive control. Short delays engage task-switching, while long delays use active maintenance, impacting performance on tasks like the AX-Continuous Performance Task (AX-CPT).
Area of Science:
- Cognitive Neuroscience
- Experimental Psychology
Background:
- Cognitive control is essential for goal-directed behavior, especially proactive control.
- The impact of timing demands on proactive control mechanisms remains unclear.
Purpose of the Study:
- To investigate how timing demands modulate proactive control.
- To determine if different timing durations elicit distinct neural processes.
Main Methods:
- Healthy adults performed the AX-Continuous Performance Task (AX-CPT) or Dot Pattern Expectancy (DPX) task.
- Cue-probe delays were manipulated between short (1s) and long (~3s) blocks.
- Electroencephalography (EEG) was used to record neural activity.
Main Results:
- Short delays impaired accuracy on rare probes and enhanced EEG signatures of task-switching.
- Long delays showed sustained EEG activity suggestive of active maintenance.
- Neural signatures differed based on cue-probe delay length.
Conclusions:
- Timing demands can instantiate distinct proactive control processes.
- The AX-CPT and DPX tasks may not solely measure working memory.
- Task parameters like cue-probe delay significantly alter cognitive control.
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