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Studying Food Reward and Motivation in Humans
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Published on: March 19, 2014

Congruency effects between number magnitude and response force.

Esther Vierck1, Andrea Kiesel

  • 1Department of Psychiatry, Mount Sinai School of Medicine, NY, USA. esther.vierck@mssm.edu

Journal of Experimental Psychology. Learning, Memory, and Cognition
|January 8, 2010
PubMed
Summary
This summary is machine-generated.

This study shows number magnitude influences response intensity initiation. Faster responses occurred when small numbers required weak presses and large numbers required forceful presses, linking numerical and physical intensity.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychophysics

Background:

  • The mental number line suggests spatial representation of numerical magnitude.
  • Previous research linked number magnitude to grip aperture, hinting at a connection with physical intensity.
  • The study investigates the direct link between numerical magnitude and response intensity using force as a parameter.

Purpose of the Study:

  • To confirm the direct relationship between number magnitude and physical intensity.
  • To investigate if number magnitude affects response initiation or execution.
  • To explore the basis for action linking magnitude domains.

Main Methods:

  • Participants judged the parity of single digits.
  • Responses were executed via key presses, varying in force (weak or forceful).
  • Response times and applied force were measured.

Main Results:

  • Response initiation was faster when small digits were mapped to weak responses and large digits to forceful responses.
  • The reversed mapping (small digits-forceful, large digits-weak) resulted in slower responses.
  • No significant association was found between number magnitude and the actually applied response force during execution.

Conclusions:

  • Number magnitude directly influences the initiation of response intensity.
  • The findings support a link between numerical magnitude and physical intensity as a foundation for action.
  • The effect is specific to response initiation, not execution.