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Related Experiment Videos

The reliability of reaction time determinations

K Hamsher, A L Benton

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |September 1, 1977
    PubMed
    Summary

    Determining reaction time (RT) reliability requires careful consideration of trial numbers. Simple RT needs 18 trials, while two-choice RT demands 30 trials for dependable results.

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    Area of Science:

    • Cognitive Psychology
    • Psychophysics
    • Human Factors

    Background:

    • Reaction time (RT) is a fundamental measure in cognitive psychology.
    • Assessing the reliability of RT measures is crucial for experimental validity.
    • Previous research has explored factors influencing RT, but optimal trial counts for reliability remain debated.

    Purpose of the Study:

    • To investigate the reliability of simple and two-choice reaction time (RT) measurements.
    • To determine the sufficient number of trials for reliable RT determination.
    • To examine the influence of central tendency measures on RT reliability.

    Main Methods:

    • Participants completed simple and two-choice reaction time tasks.
    • The number of trials was systematically varied to assess reliability.
    • Different measures of central tendency were applied to the RT data.

    Main Results:

    • 18 trials were found to be sufficient for a highly reliable simple RT determination.
    • 30 trials were necessary to achieve a highly reliable two-choice RT determination.
    • The choice of central tendency measure did not significantly affect the reliability of RT.

    Conclusions:

    • The number of trials significantly impacts the reliability of RT measures, with more complex tasks requiring more trials.
    • Researchers should consider the task complexity when designing experiments to ensure adequate reliability.
    • Central tendency measures do not appear to be a critical factor in RT reliability.

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