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Inhibition during task switching is affected by the number of competing tasks
Juliane Scheil1, Thomas Kleinsorge2
1Leibniz Research Centre for Working Environment and Human Factors, Ardeystraße 67, D-44139, Dortmund, Germany. scheil@ifado.de.
Memory & Cognition
|September 12, 2023
Summary
Reducing the number of possible tasks in task switching experiments eliminates inhibition costs. This suggests simpler task selection mechanisms operate with fewer options, impacting cognitive control.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Task switching involves cognitive control and inhibition.
- n-2 repetition costs are used to measure inhibition during task switching.
Purpose of the Study:
- To investigate how reducing the number of candidate tasks affects n-2 repetition costs.
- To explore the underlying mechanisms of task selection and inhibition.
Main Methods:
- A modified task switching paradigm with a precue to reduce candidate tasks.
- Experiments involved reducing task options from three or four to two.
- A control condition used the standard cueing paradigm.
Main Results:
- Significant n-2 repetition costs were observed with three candidate tasks.
- No n-2 repetition costs were found when the number of candidate tasks was reduced to two.
- This indicates reduced inhibition when fewer tasks are available.
Conclusions:
- Task selection mechanisms, possibly based on antagonistic constraints, are influenced by the number of available tasks.
- Reducing candidate tasks simplifies the selection process, diminishing the need for inhibition.
