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Related Experiment Videos

Sequential effects in number comparison.

W Schwarz1, A Ischebeck

  • 1Nijmegen Institute for Cognition and Information, University of Nijmegen, The Netherlands. schwarz@nici.kun.nl

Journal of Experimental Psychology. Human Perception and Performance
|October 20, 2000
PubMed
Summary

Sequential trial-to-trial effects in number processing reveal repetition benefits occur early in cognition. These findings challenge theories suggesting the comparison stage is bypassed during stimulus repetition.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Experimental Psychology

Background:

  • Number processing is often conceptualized within a modular framework.
  • Sequential trial-to-trial effects can provide insights into cognitive processes.
  • Previous models proposed bypassing the comparison stage upon stimulus repetition.

Purpose of the Study:

  • To investigate sequential trial-to-trial effects in a number comparison task.
  • To determine the locus of repetition effects within the number processing framework.
  • To test competing accounts of stimulus repetition in cognitive tasks.

Main Methods:

  • Two experiments were conducted using a number comparison task.
  • Experiment 1 presented numbers as digits; Experiment 2 used both digits and words.

Related Experiment Videos

  • Response times were analyzed for effects of stimulus repetition and numerical distance.

    • Main Results:

    • Faster responses were observed when the same number was repeated.
    • Repetition effects were additive with the numerical distance effect in both experiments.
    • Significant effects were found for repeating physical stimuli, numbers in different notations, and numbers in the same notation.

    Conclusions:

    • Results strongly argue against models where the comparison stage is bypassed upon repetition.
    • Evidence favors an early, precomparison locus for repetition effects in number processing.
    • The findings support a modular framework where repetition influences early stages of number cognition.