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Multiple bottlenecks in overlapping task performance

R De Jong1

  • 1Department of Psychology, Ohio State University.

Journal of Experimental Psychology. Human Perception and Performance
|October 1, 1993
PubMed
Summary
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A dual-bottleneck model explains task performance limits. A response-initiation bottleneck, not a central bottleneck, primarily causes performance decrements in overlapping tasks.

Area of Science:

  • Cognitive psychology
  • Human performance

Background:

  • Overlapping-task performance is often limited by processing bottlenecks.
  • Existing models propose a central bottleneck, but its role in task interference is debated.

Purpose of the Study:

  • To propose and test a dual-bottleneck model for overlapping-task performance.
  • To differentiate the roles of central and response-initiation bottlenecks.

Main Methods:

  • Manipulated response requirements in overlapping tasks.
  • Measured underadditive interactions as indicators of parallel processing.

Main Results:

  • Eliminating the response-initiation bottleneck significantly reduced underadditive interactions.
  • Evidence suggests the response-initiation bottleneck, not the central bottleneck, is the primary cause of performance limitations.

Related Experiment Videos

Conclusions:

  • The response-initiation bottleneck plays a critical role in limiting overlapping-task performance.
  • Perceptual identification and categorization appear to rely on the central bottleneck.