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Related Experiment Videos

Dissociating stimulus-stimulus and response-response effects in the Stroop task.

James R Schmidt1, Jim Cheesman

  • 1Department of Psychology, University of Saskatchewan, Saskatoon. james.schmidt@usask.ca

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
|July 23, 2005
PubMed
Summary

This study on the Stroop colour-word task reveals distinct semantic and response competition mechanisms. Colour associates primarily show semantic effects, unlike colour words which exhibit both semantic and response competition.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • The Stroop task is a classic method for studying cognitive interference.
  • Understanding the interplay between semantic and response competition is crucial for cognitive models.

Purpose of the Study:

  • To investigate the separate semantic and response competition mechanisms in the Stroop colour-word task.
  • To compare interference effects between colour words and colour associates.

Main Methods:

  • Manual Stroop task with three trial types: identity, different response, and same response.
  • Stimuli included colour words and colour associates presented in incongruent ink colours.

Main Results:

  • Colour words replicated previous findings, showing both semantic and response competition.

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  • Colour associates demonstrated only a semantic effect, challenging existing response competition accounts.

    • Conclusions:

    • The Stroop colour-word task involves at least two distinct mechanisms: semantic and response competition.
    • Findings support semantic interpretations of the colour associate Stroop effect and challenge response competition theories for this stimulus type.