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Exploring the differences in distributional properties between Stroop and Simon effects using delta plots.

Michael S Pratte1, Jeffrey N Rouder, Richard D Morey

  • 1Department of Psychological Sciences, University of Missouri, Columbia, Missouri 65211, USA. prattems@gmail.com

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Summary
This summary is machine-generated.

Cognitive control and inhibition differ between Stroop and Simon tasks. Stroop effects grow with response time, while Simon effects shrink, revealing distinct temporal dynamics in cognitive processes.

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Area of Science:

  • Cognitive psychology
  • Neuroscience

Background:

  • Stroop and Simon tasks are key tools for studying cognitive control and inhibition.
  • Understanding the temporal dynamics of these effects is crucial for cognitive theories.

Purpose of the Study:

  • To compare the distributional properties and time course of Stroop and Simon effects.
  • To investigate whether observed differences are stable within participants and across stimulus materials.

Main Methods:

  • Utilized delta plots to analyze the distributional properties of Stroop and Simon effects.
  • Conducted three experiments to examine within-participant consistency and stimulus material effects.
  • Performed two additional experiments to explore factors influencing the time course of effects.

Main Results:

  • Stroop effects increase as response times slow, while Simon effects decrease and can reverse with slower responses.
  • These diverging temporal patterns were consistent within participants and across identical stimulus materials.
  • The time course determinant is not solely based on the location of distracting information.

Conclusions:

  • Stroop and Simon tasks exhibit fundamentally different temporal dynamics in cognitive control and inhibition.
  • These stable, diverging time course patterns provide critical data for refining cognitive control theories.
  • Future research should explore other factors beyond location that influence these task-specific temporal profiles.