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Task uncertainty can account for mixing and switch costs in task-switching
Patrick S Cooper1, Paul M Garrett2, Jaime L Rennie1
1Functional Neuroimaging Laboratory, School of Psychology, University of Newcastle, Callaghan, Australia; Priority Research Centre for Translational Neuroscience and Mental Health, University of Newcastle, Callaghan, Australia.
Plos One
|June 25, 2015
Summary
Cognitive control prioritizes goal-relevant information to manage uncertainty. This study shows uncertainty influences task switching, supporting cognitive control as an information processor for environmental uncertainty.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Information Theory
Background:
- Cognitive control is crucial for managing uncertainty and conflict in tasks like response selection and task switching.
- A recent hypothesis suggests cognitive control prioritizes goal-relevant information to resolve uncertainty.
- Prior research supported this using conflict resolution paradigms.
Purpose of the Study:
- To investigate if cognitive control during task switching aligns with the uncertainty-prioritization hypothesis.
- To determine if information theory can quantify uncertainty in task switching.
- To test if quantified uncertainty explains behavioral effects in task switching.
Main Methods:
- Utilized a cued task-switching paradigm.
- Employed information theory to measure uncertainty across different trial types.
- Analyzed behavioral data (accuracy and reaction time) in relation to uncertainty levels.
Main Results:
- Higher uncertainty correlated with reduced performance efficiency (slower, less accurate responses).
- This effect was pronounced in switch trials and trials with limited preparation time.
- Both mixing and switch costs were linked to a shared episodic control process.
Conclusions:
- Findings support the view of cognitive control as a mechanism for resolving environmental uncertainty.
- Cognitive control's role in task switching is consistent with prioritizing goal-relevant information under uncertainty.
- The study provides evidence for a unified information-processing account of cognitive control.
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