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Selective interference of finger movements on basic addition and subtraction problem solving.

Nicolas Michaux1, Nicolas Masson, Mauro Pesenti

  • 1Institut de Recherche en Sciences Psychologiques and Institute of Neuroscience, Université catholique de Louvain, Belgium.

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Finger movements selectively slow down addition and subtraction, but not multiplication, in adults. This suggests a functional link between finger use and basic arithmetic problem-solving processes.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Mathematics Education

Background:

  • Fingers are crucial for early arithmetic learning, especially addition and subtraction.
  • Adult brain activity during mental math overlaps with areas controlling finger movements.
  • The functional relationship between finger representations and mental arithmetic remains unclear.

Purpose of the Study:

  • To investigate if finger movements interfere with mental arithmetic.
  • To determine if this interference is specific to arithmetic operations typically supported by fingers.
  • To explore the functional relationship between finger movements and mental arithmetic.

Main Methods:

  • Experiment 1: Participants solved addition, subtraction, and multiplication problems with hands at rest versus during sequential finger movements.
  • Experiment 2: Participants solved the same problems during sequential foot movements.
  • Interference was measured by changes in problem-solving time.

Main Results:

  • Finger movements caused a significant time cost for addition and subtraction, but not multiplication.
  • Foot movements interfered non-specifically with all arithmetic operations.
  • This selective interference highlights the specific role of finger-related processes.

Conclusions:

  • Finger movements and mental arithmetic, particularly for addition and subtraction, are functionally interconnected.
  • The findings support the hypothesis that finger-based representations are involved in solving these arithmetic problems.
  • This research provides evidence for the embodied cognition theory in mathematical processing.