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Related Experiment Videos

Use of partial stimulus information in response processing.

R de Jong1, M Wierda, G Mulder

  • 1University of Illinois, Urbana-Champaign.

Journal of Experimental Psychology. Human Perception and Performance
|November 1, 1988
PubMed
Summary
This summary is machine-generated.

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The reaction time benefit arises from efficient stimulus-response translation, not early preparation. Response selection variability, not later processes, dictates overall reaction time.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • The relationship between stimulus features and response requirements influences reaction time.
  • Understanding the cognitive processes underlying this reaction time benefit is crucial for optimizing human performance.

Purpose of the Study:

  • To investigate the locus of the reaction time benefit when stimulus and response sets correspond.
  • To determine the role of preliminary stimulus information in response preparation.
  • To identify the primary source of variability in reaction time.

Main Methods:

  • Utilized event-related brain potentials (ERPs) to measure stimulus- and response-related processing times.
  • Developed and applied a novel index, the corrected motor asymmetry (CMA), for selective response preparation.

Related Experiment Videos

  • Analyzed trial-to-trial variability in different stages of information processing.

    • Main Results:

    • No evidence was found for the use of preliminary stimulus information during response preparation.
    • The reaction time benefit was localized primarily within response selection processes.
    • Variability in response selection duration was the main driver of reaction time variability, while later processes were stable.

    Conclusions:

    • The observed benefit likely stems from a more efficient stimulus-response translation algorithm.
    • Response selection is a critical, variable stage in choice reaction performance.
    • Findings inform discrete and continuous models of choice reaction time.