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Related Experiment Video

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Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics (BM-PROMA)
10:58

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Published on: August 28, 2021

Grasping numbers.

Giovanna Moretto1, Giuseppe di Pellegrino

  • 1Dipartimento di Psicologia, Università di Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy.

Experimental Brain Research
|April 23, 2008
PubMed
Summary
This summary is machine-generated.

Perceiving numbers primes hand grasping actions. Small numbers facilitate precision grips, while large numbers potentiate power grips, suggesting a shared magnitude system for numerical and physical quantities.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Human-Computer Interaction

Background:

  • Theoretical and empirical studies link numerical processing to goal-directed hand actions.
  • The relationship between number magnitude and motor control of hand movements requires further investigation.

Purpose of the Study:

  • To investigate the influence of numerical magnitude on hand grasping movements.
  • To determine if number perception automatically primes specific hand grip selections.

Main Methods:

  • Two experiments were conducted using visual Arabic numerals.
  • Participants performed power or precision grip responses based on numeral properties (semantic or surface).

Main Results:

  • Small numerical values significantly facilitated precision grip.
  • Large numerical values significantly potentiated power grip.
  • Numeral perception automatically primed corresponding grasping gestures.

Conclusions:

  • Numerical magnitude powerfully influences hand grasping movement selection.
  • Symbolic numerical processing and physical quantitative information converge onto a shared action-oriented magnitude system.