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Related Experiment Videos

Does irrelevant stimulus location affect response selection?

T Hasbroucq1, C A Possamaï

  • 1Laboratoire de Neurosciences Cognitives, CNRS, Marseille, Occitanie, France. thierry@inf.cnrs-mrs.fr

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
|September 1, 1995
PubMed
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The Simon effect, where stimulus location influences response time, was investigated. Findings suggest the effect does not solely occur during response selection, challenging previous theories.

Area of Science:

  • Cognitive Psychology
  • Human Factors
  • Neuroscience

Background:

  • The Simon effect demonstrates that reaction time (RT) is influenced by the spatial correspondence between stimulus and response locations.
  • Previous research suggested the Simon effect occurs during the response selection stage, dependent on effectors used.
  • The role of effector repertoire in modulating the Simon effect remains an area of investigation.

Purpose of the Study:

  • To examine the additive effects of the Simon effect and finger response repertoire on reaction time.
  • To test the hypothesis that the Simon effect occurs at the response selection stage.

Main Methods:

  • Participants performed a keypress task based on stimulus color, with stimuli presented to the left or right.
  • Reaction times were measured under conditions varying stimulus-response location correspondence and finger response repertoire (within-hand vs. between-hand).

Related Experiment Videos

Main Results:

  • The Simon effect was observed, with shorter RTs when stimulus and response locations corresponded.
  • The effects of stimulus-response location correspondence and finger response repertoire were found to be additive.
  • This additivity suggests the Simon effect does not exclusively arise from the response selection stage.

Conclusions:

  • The additive nature of the Simon effect and finger response repertoire challenges the response selection hypothesis.
  • These findings imply that the Simon effect may involve processing stages beyond response selection.
  • Further research is needed to elucidate the precise locus and mechanisms of the Simon effect.