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Is Approximate Number Precision a Stable Predictor of Math Ability?
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Libertus, Melissa E.; Feigenson, Lisa; Halberda, Justin – Learning and Individual Differences, 2013
Previous research shows that children's ability to estimate numbers of items using their Approximate Number System (ANS) predicts later math ability. To more closely examine the predictive role of early ANS acuity on later abilities, we assessed the ANS acuity, math ability, and expressive vocabulary of preschoolers twice, six months apart. We…
Descriptors: Preschool Children, Number Systems, Mathematics, Nonverbal Ability
Preschool Acuity of the Approximate Number System Correlates with School Math Ability
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Libertus, Melissa E.; Feigenson, Lisa; Halberda, Justin – Developmental Science, 2011
Previous research shows a correlation between individual differences in people's school math abilities and the accuracy with which they rapidly and nonverbally approximate how many items are in a scene. This finding is surprising because the Approximate Number System (ANS) underlying numerical estimation is shared with infants and with non-human…
Descriptors: Nonverbal Ability, Mathematics, Number Systems, Preschool Children
Impaired Acuity of the Approximate Number System Underlies Mathematical Learning Disability (Dyscalculia)
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Mazzocco, Michele M. M.; Feigenson, Lisa; Halberda, Justin – Child Development, 2011
Many children have significant mathematical learning disabilities (MLD, or dyscalculia) despite adequate schooling. The current study hypothesizes that MLD partly results from a deficiency in the Approximate Number System (ANS) that supports nonverbal numerical representations across species and throughout development. In this study of 71 ninth…
Descriptors: Learning Disabilities, Mathematics Achievement, Academic Achievement, Number Systems
Developmental Change in the Acuity of the "Number Sense": The Approximate Number System in 3-, 4-, 5-, and 6-Year-Olds and Adults
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Halberda, Justin; Feigenson, Lisa – Developmental Psychology, 2008
Behavioral, neuropsychological, and brain imaging research points to a dedicated system for processing number that is shared across development and across species. This foundational Approximate Number System (ANS) operates over multiple modalities, forming representations of the number of objects, sounds, or events in a scene. This system is…
Descriptors: Number Systems, Neurology, Child Development, Children