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Task switching: on the origin of response congruency effects.
Andrea Kiesel1, Mike Wendt, Alexandra Peters
1Institut für Psychologie III, Julius-Maximilians Universität Würzburg, 97070, Würzburg, Germany. kiesel@psychologie.uni-wuerzburg.de
Psychological Research
|September 1, 2005
Summary
Cognitive task switching reveals that direct stimulus-response (S-R) associations, not abstract task rules in working memory, primarily drive performance benefits. Frequent S-R pairings enhance these effects during task switching.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Performance
Background:
- Task switching involves alternating between cognitive tasks.
- Response congruency effects occur when stimuli require the same response in both tasks.
- Debate exists on whether these effects stem from abstract task representations or direct stimulus-response (S-R) associations.
Purpose of the Study:
- To investigate the underlying mechanisms of response congruency effects during task switching.
- To differentiate between abstract task-set activation and direct S-R associations as mediators of these effects.
Main Methods:
- Experiment 1 manipulated concurrent memory load.
- Experiment 2 manipulated the frequency of specific S-R associations.
- Response times and accuracy were measured during task switching.
Main Results:
- Between-task response congruency effects were unaffected by concurrent memory load.
- Congruency effects were significantly stronger for frequently encountered S-R associations.
- Performance benefits were observed for stimuli with shared S-R rules across tasks.
Conclusions:
- Findings support the role of direct S-R associations in mediating response congruency effects.
- Results do not support a sole mediation by abstract task-set activation in working memory.
- Direct S-R associations play a substantial role in cognitive task switching performance.