Typical numerosity adaptation despite selectively impaired number acuity in dyscalculia

Giovanni Anobile, Guido Marco Cicchini, Filippo Gasperini, David C. Burr

Research output: Contribution to journalArticle

Abstract

It has been suggested that a core deficit of the “number sense” may underlie dyscalculia. We test this idea by measuring perceptual adaptation and discrimination thresholds for numerosity and object size in a group of dyscalculic and typical preadolescents (N = 71, mean age 12). We confirmed that numerosity discrimination thresholds are higher in developmental dyscalculia, while size thresholds are not affected. However, dyscalculics adapted to numerosity in a similar way to typicals. This suggests that although numerosity thresholds are selectively higher in dyscalculia, the mechanisms for perceiving numerosity are otherwise similar, suggesting that have a similar, but perhaps noisier, number sense.

Original languageEnglish
Pages (from-to)43-49
Number of pages7
JournalNeuropsychologia
Volume120
DOIs
Publication statusPublished - Nov 1 2018

Keywords

  • Approximate Number System
  • Dyscalculia
  • Numerical cognition
  • Numerosity adaptation
  • Numerosity perception

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience
  • Behavioral Neuroscience

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