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Related Experiment Videos

Stimulus-response compatibility and the Simon effect: toward a conceptual clarification.

T Hasbroucq1, Y Guiard

  • 1Unité de Neurosciences Cognitives, Centre National de la Recherche Scientifique, Marseille, France.

Journal of Experimental Psychology. Human Perception and Performance
|February 1, 1991
PubMed
Summary

The Simon effect is not due to stimulus-response compatibility (SRC), but rather stimulus congruity (SC). When SC is absent, the Simon effect disappears, challenging current cognitive psychology views.

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Area of Science:

  • Cognitive Psychology
  • Human Information Processing
  • Perception and Attention

Background:

  • The Simon effect is commonly attributed to stimulus-response compatibility (SRC).
  • Previous research has overlooked the role of stimulus congruity (SC) in the Simon effect.
  • SC involves the correspondence between simultaneous stimulus aspects, often confounded with spatial SRC.

Purpose of the Study:

  • To re-evaluate the underlying mechanisms of the Simon effect.
  • To investigate the independent contributions of stimulus congruity (SC) and stimulus-response compatibility (SRC).
  • To determine if the Simon effect is a spatial variant of the Stroop effect.

Main Methods:

  • Replication of the Hedge and Marsh (1975) reversal effect in Experiment 1.

Related Experiment Videos

  • Manipulation of irrelevant spatial stimulus-response compatibility (SRC) while controlling for stimulus congruity (SC) in Experiment 2.

    • Main Results:

    • The Hedge and Marsh reversal effect was replicated, supporting the role of SC.
    • In Experiment 2, the Simon effect vanished when SC was constant and SRC varied.
    • This indicates that SC fully accounts for the Simon effect.

    Conclusions:

    • The Simon effect is primarily driven by stimulus congruity (SC), not stimulus-response compatibility (SRC).
    • The Simon effect is a spatial analogue of the Stroop effect.
    • This challenges the prevailing view of automaticity in response determination and weakens a key argument for it.