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Related Experiment Videos

Stroop process dissociations: the relationship between facilitation and interference

D S Lindsay1, L L Jacoby

  • 1Department of Psychology, University of Victoria, British Columbia, Canada.

Journal of Experimental Psychology. Human Perception and Performance
|April 1, 1994
PubMed
Summary
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The Stroop task reveals that color naming and word reading operate independently. Manipulating stimulus conditions showed that automatic processes

Area of Science:

  • Cognitive Psychology
  • Experimental Psychology

Background:

  • The Stroop task is a classic measure of cognitive interference.
  • Understanding the independent contributions of automatic processes like word reading and controlled processes like color naming is crucial.

Purpose of the Study:

  • To quantitatively estimate the independent contributions of color-naming and word-reading processes in the Stroop task.
  • To investigate how stimulus degradation and item proportion affect these processes.

Main Methods:

  • Utilized L.L. Jacoby's (1991) process dissociation procedure.
  • Conducted experiments manipulating stimulus color degradation and the proportion of incongruent items.

Main Results:

  • Color naming and word reading were found to operate independently in determining responses.

Related Experiment Videos

  • Degrading stimulus colors eliminated Stroop asymmetry and reduced color-naming contributions.
  • Increasing incongruent items reduced word-reading contributions without affecting color-naming.

    • Conclusions:

    • The process dissociation procedure effectively disentangles automatic and controlled processes in the Stroop task.
    • Automatic processes' facilitating and interfering effects are not accurately measured by baseline differences.