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A Simon effect for stimulus-response duration.

Wilfried Kunde1, Christian Stöcker

  • 1University of Würzburg, Psychological Institute III, Germany. kunde@psychologie.uni-wuerzburg.de

The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology
|June 6, 2002
PubMed
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This study explores the Simon effect using stimulus duration, not location. Results show irrelevant stimulus features like duration and location are automatically processed, independently influencing responses.

Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Neuroscience

Background:

  • The Simon effect typically demonstrates how stimulus-response (S-R) compatibility influences reaction times.
  • Previous research has primarily focused on spatial S-R compatibility.

Purpose of the Study:

  • To investigate a non-spatial variant of the Simon effect using stimulus duration.
  • To examine the automatic processing of irrelevant stimulus features and their independent priming effects on responses.

Main Methods:

  • Experiment 1: Participants responded to stimulus color by pressing a single key briefly or longer, with stimulus duration as a variable.
  • Experiment 2: Participants responded to stimulus form (left/right key) and color (brief/long keypress), with task-irrelevant stimulus location and duration.

Related Experiment Videos

Main Results:

  • In Experiment 1, response times were influenced by the compatibility between stimulus duration and keypress duration.
  • Experiment 2 revealed approximately additive correspondence effects for both S-R location and S-R duration.
  • Irrelevant stimulus features (location, duration) were processed automatically and primed corresponding responses independently.

Conclusions:

  • The findings extend the Simon effect to non-spatial features like stimulus duration.
  • Automatic processing of irrelevant stimulus features influences response selection in a parallel and independent manner.