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Related Experiment Video

Updated: May 13, 2025

Experience is Instrumental in Tuning a Link Between Language and Cognition: Evidence from 6- to 7- Month-Old Infants' Object Categorization
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Sharpening the number sense: Developmental trends in numerosity perception.

Irene Oeo Morín1, Fien Depaepe2, Bert Reynvoet1

  • 1Brain and Cognition, KU (Katholieke Universiteit) Leuven 3000 Leuven, Belgium; Faculty of Psychology and Educational Sciences, KU Leuven, Kulak Campus, 8500 Kortrijk, Belgium.

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Keywords:
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Area of Science:

  • Cognitive Development
  • Perceptual Psychology
  • Numerical Cognition

Background:

  • Numerosity perception, estimating quantities without counting, improves with age.
  • Debate exists on whether this improvement stems from enhanced numerical precision (sharpening hypothesis) or better filtering of non-numerical cues (filtering hypothesis).

Purpose of the Study:

  • To investigate the developmental trajectory of numerosity perception.
  • To determine the cognitive mechanisms underlying age-related improvements in numerosity perception.

Main Methods:

  • Examined numerosity perception in three age groups: 5.65, 11.03, and 20.10 years.
  • Utilized regression and ANOVA to analyze the contribution of numerical and non-numerical information to performance.

Main Results:

  • Performance accuracy in numerosity perception increased with age.
  • Numerical information was the primary driver of performance across all age groups, with its influence growing with age.
  • A consistent bias towards non-numerical features was observed in all age groups.

Conclusions:

  • Results support the sharpening hypothesis, indicating that children and young adults increasingly focus on numerical information as they mature.
  • Findings highlight the developmental shift towards prioritizing numerical cues in numerosity perception from childhood to adulthood.