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Related Experiment Videos

There's a SNARC in the Size Congruity Task.

Tina Weis1, Steffen Theobald1,2, Andreas Schmitt1

  • 1Cognitive and Developmental Psychology, Center for Cognitive Science, University of Kaiserslautern, Kaiserslautern, Germany.

Frontiers in Psychology
|November 20, 2018
PubMed
Summary

The size congruity effect and the Spatial Numerical Association of Response Codes (SNARC) effect are independent. These findings suggest that number representation involves distinct processing spaces for size and spatial associations.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Perception

Background:

  • The size congruity effect arises from interference between numerical magnitude and physical size of numbers.
  • The Spatial Numerical Association of Response Codes (SNARC) effect links numerical magnitude to spatial response locations.
  • Previous research indicated independence between size congruity and SNARC effects in specific tasks.

Purpose of the Study:

  • To investigate the dependency between size congruity and SNARC effects in numerical magnitude judgment tasks.
  • To determine if these effects operate independently or interact within number representation.
  • To extend understanding of number processing and its underlying representational spaces.

Main Methods:

  • Participants performed numerical magnitude and parity judgment tasks.
Keywords:
compatibilityideomotor theorymental number linenumber symbolresponse dimension

Related Experiment Videos

  • Stimuli involved numbers varying in both numerical value and physical size.
  • Response times and accuracy were analyzed to assess the size congruity and SNARC effects.

    • Main Results:

    • Independent size congruity and SNARC effects were observed in numerical magnitude judgment tasks.
    • This independence was replicated in parity judgment tasks.
    • The findings support the notion that these effects are dissociable.

    Conclusions:

    • Size congruity and SNARC effects operate in distinct representational spaces.
    • Number representation likely involves separate systems for processing magnitude, physical size, and spatial associations.
    • These results have implications for models of numerical cognition and how numbers are represented in the brain.