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Related Experiment Videos

Automatic quantity processing in 5-year olds and adults.

Titia Gebuis1, Roi Cohen Kadosh, Edward de Haan

  • 1Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands. T.Gebuis@uu.nl

Cognitive Processing
|July 9, 2008
PubMed
Summary
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Adults show a size congruity effect (SCE) for both symbolic and non-symbolic numbers. Five-year-olds only exhibit this effect for non-symbolic quantities, suggesting an immature understanding of number symbols.

Area of Science:

  • Cognitive Psychology
  • Developmental Psychology
  • Numerical Cognition

Background:

  • The size congruity effect (SCE) demonstrates automatic processing of numerical information.
  • Investigating SCE across symbolic (e.g., Arabic numerals) and non-symbolic (e.g., dot arrays) formats is crucial for understanding numerical cognition.
  • Understanding how children process symbolic and non-symbolic numerical information is key to early mathematical development.

Purpose of the Study:

  • To determine if the size congruity effect (SCE) is notation-independent in adults.
  • To assess the ability of 5-year-old children to automatically process symbolic and non-symbolic numerosities.
  • To investigate the developmental trajectory of symbolic number representation.

Main Methods:

  • Adults and 5-year-old children completed physical and numerical size judgment tasks.

Related Experiment Videos

  • Tasks involved both symbolic (Arabic numerals) and non-symbolic (dot arrays) stimuli.
  • The size congruity effect (SCE) was measured by comparing performance on congruent versus incongruent trials.

    • Main Results:

    • Adults exhibited a SCE for both symbolic and non-symbolic numerical tasks, validating the non-symbolic task for assessing automatic processing.
    • Children demonstrated a SCE only for non-symbolic notation, not for symbolic notation.
    • This dissociation suggests that the absence of a symbolic SCE in children is due to an underdeveloped association between number symbols and their numerical meaning, rather than task demands.

    Conclusions:

    • The non-symbolic size congruity task is a reliable measure of automatic non-symbolic numerosity processing in adults.
    • Five-year-olds' inability to show a symbolic SCE indicates an immature link between number symbols and their magnitudes.
    • Early number symbol acquisition relies on developing robust associations between abstract symbols and their quantitative meaning.