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Time pressure effects on information processing in overlapping tasks: evidence from the lateralized readiness
Jörg Sangals1, Lars Ross, Werner Sommer
1Biological Psychology/Psychophysiology, Humboldt University at Berlin, Hausvogteiplatz 5-7, 10117 Berlin, Germany. joerg.sanglas@rz.hu-berlin.de
Acta Psychologica
|October 27, 2004
Summary
Performing two tasks at once impairs information processing. Time pressure reduces this interference by speeding up motor responses and potentially making central processing stages available earlier, as shown by the lateralized readiness potential (LRP).
Area of Science:
- Cognitive psychology
- Neuroscience
- Human factors
Background:
- Concurrent task performance often leads to information processing interference.
- This interference is typically explained by structural bottlenecks or strategic scheduling in cognitive processing.
Purpose of the Study:
- To investigate how time pressure on a second response affects information processing in overlapping tasks.
- To examine the role of the lateralized readiness potential (LRP) in understanding task interference under time constraints.
Main Methods:
- Utilized the lateralized readiness potential (LRP) to record brain activity during dual-task performance.
- Manipulated time pressure for the second of two responses in overlapping tasks.
Main Results:
- Time pressure shortened response latencies by reducing motor processing time.
- Task interference decreased under time pressure, likely due to earlier central bottleneck availability.
- The LRP indicated an additional bottleneck after response selection, possibly related to response initiation refractoriness.
Conclusions:
- Time pressure can mitigate dual-task interference by altering processing stage timing.
- Evidence suggests a bottleneck following response selection, potentially linked to response initiation.
- The LRP is a valuable tool for dissecting processing stages and bottlenecks in cognitive tasks.