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Processing of irrelevant location information under dual-task conditions
Jochen Müsseler1, Peter Wühr, Carlo Umiltá
1Max Planck Institute of Human Cognitive and Brain Sciences, Munich, Germany. muesseler@psych.rwth-aachen.de
Psychological Research
|September 27, 2005
Summary
This study investigated how irrelevant location information is processed in Simon-like tasks. Findings suggest spatial codes are automatically formed exogenously, not primarily by endogenous selection.
Area of Science:
- Cognitive Psychology
- Human Information Processing
- Perceptual Psychology
Background:
- The Simon task reveals how stimulus-response conflict impacts performance.
- Understanding the automaticity of spatial information processing is crucial for cognitive models.
Purpose of the Study:
- To determine if irrelevant location information in Simon-like tasks is processed exogenously or endogenously.
- To investigate the automaticity of spatial code formation.
Main Methods:
- Three experiments used a primary reaction task (R1) and a secondary visual stimulus identification task (S2).
- Manipulated the presence and processing requirements of the secondary stimulus (S2).
- Introduced contralateral noise to S2 in one experiment to disrupt exogenous processing.
Main Results:
- A significant cross-task Simon effect was observed when S2 was presented alone.
- The cross-task Simon effect diminished when a contralateral noise stimulus was introduced.
- Processing requirements of S2 did not significantly alter the cross-task Simon effect.
Conclusions:
- The results support the hypothesis that task-irrelevant spatial codes are formed automatically.
- Exogenously triggered selection appears to be the primary mechanism, with less importance for endogenous selection.