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Task sets under reconstruction: effects of partially incorrect precues.
Thomas Kleinsorge1, Patrick D Gajewski, Herbert Heuer
1Institut für Arbeitsphysiologie an der Universität Dortmund, Dortmund, Germany. kleinsorge@ifado.de
Summary
Switching tasks involves preparing for the new task and disengaging from the old one. Research shows task preparation involves concurrent representations on different levels, not just a direct update.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Task switching requires disengaging from a previous task set and preparing for a new one.
- The precise mechanisms of task preparation and disengagement are not fully understood.
Purpose of the Study:
- To investigate whether task set preparation for a task shift involves a direct update of the task set carried over from the preceding trial.
- To examine the interplay between the intertask relation (relation to the previous trial's task) and the precue-to-task relation (relation to the cued task).
Main Methods:
- Three experiments were conducted, factorially varying intertask relation and precue-to-task relation.
- Invalid precues and varying precueing intervals were used to assess task preparation costs.
Main Results:
- Invalid precues led to significant costs, increasing with longer precueing intervals.
- The effect of the precue-to-task relation did not diminish as it increased, suggesting distinct representation levels.
- The persistence of intertask relation effects was context-sensitive, depending on the possibility of task repetitions.
Conclusions:
- Task preparation for a shift involves concurrent representations of tasks on different levels, rather than a simple update.
- Intertask and precue-to-task relations operate through distinct mechanisms.
- The control over task set persistence is context-dependent, influenced by the predictability of task repetitions.