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Related Experiment Videos

A memory-based, Simon-like, spatial congruence effect: evidence for persisting spatial codes.

John X Zhang1, Marcia K Johnson

  • 1Yale University, New Haven, CT, USA. jxzhang@hku.hk

The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology
|June 19, 2004
PubMed
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The Simon effect, a spatial congruence phenomenon, persists longer than previously thought. Working memory may hold spatial information, influencing responses even after long delays.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • The Simon effect demonstrates faster reaction times when stimulus and response locations align.
  • Current theories attribute this to rapidly decaying spatial codes generated automatically upon stimulus presentation.

Purpose of the Study:

  • To investigate the duration of spatial congruence effects in a Simon-like task.
  • To explore the role of working memory in maintaining spatial information relevant to response selection.

Main Methods:

  • Two experiments utilized working memory tasks with delayed responses.
  • Participants performed a Simon-like task, with delays up to 2400 ms between stimulus presentation and response cue.

Main Results:

Related Experiment Videos

  • A significant Simon-like spatial congruence effect was observed even after a 2400 ms delay.
  • The persistence of the effect challenges the assumption of rapid decay for spatial codes.

Conclusions:

  • Spatial information can be maintained in working memory beyond short perceptual timescales.
  • Working memory coding of spatial context may influence response selection, contributing to sustained Simon effects.