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The interference effect in arithmetic fact solving: An fMRI study.

Alice De Visscher1, Sam C Berens2, James L Keidel2

  • 1Parenting and Special Education Research Unit, Katholieke Universiteit Leuven, Belgium; School of Psychology, University of Sussex, United Kingdom; Institut de Recherche en Sciences Psychologiques, Université catholique de Louvain, Belgium.

Neuroimage
|May 12, 2015
PubMed
Summary
This summary is machine-generated.

Brain imaging reveals that the left angular gyrus is involved in processing multiplication interference, while the right intraparietal sulcus handles problem size effects, independent of retrieval strategy.

Keywords:
Angular gyrusArithmetic factInterference effectIntraparietal sulcusMultiplicationNumerical cognition

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Mathematical Cognition

Background:

  • Arithmetic fact retrieval is susceptible to interference from similar problems.
  • Behavioral studies show interference negatively impacts multiplication fact knowledge in various populations.
  • Understanding the neural basis of interference in arithmetic is crucial.

Purpose of the Study:

  • To investigate the brain regions associated with the interference effect in multiplication problem-solving.
  • To differentiate the neural correlates of interference, problem size, and retrieval strategy.
  • To elucidate the functional role of the left angular gyrus and right intraparietal sulcus in arithmetic cognition.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to scan 20 healthy adults during a multiplication task.
  • A 2x2 factorial design manipulated interference level and problem size.
  • Participants indicated their solution strategy (retrieval from memory) after each trial.

Main Results:

  • The left angular gyrus showed greater activation for low-interference problems compared to high-interference problems.
  • The right intraparietal sulcus demonstrated increased activation for large problems versus small problems.
  • These effects were independent of each other and not attributable to retrieval strategy.

Conclusions:

  • The left angular gyrus is sensitive to multiplication interference, suggesting a role in automatic problem-answer mapping.
  • The right intraparietal sulcus is modulated by problem size, supporting theories related to answer magnitude overlap.
  • These findings provide novel insights into the neural mechanisms underlying arithmetic fact retrieval and interference effects.