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Wang, Yunqi; Geng, Fengji; Hu, Yuzheng; Du, Fenglei; Chen, Feiyan – Cognition, 2013
Experienced mental abacus (MA) users are able to perform mental arithmetic calculations with unusual speed and accuracy. However, it remains unclear whether their extraordinary gains in mental arithmetic ability are accompanied by an improvement in numerical processing efficiency. To address this question, the present study, using a numerical…
Descriptors: Mental Computation, Arithmetic, Cognitive Processes, Efficiency
Piazza, Manuela; Facoetti, Andrea; Trussardi, Anna Noemi; Berteletti, Ilaria; Conte, Stefano; Lucangeli, Daniela; Dehaene, Stanisalas; Zorzi, Marco – Cognition, 2010
Developmental dyscalculia is a learning disability that affects the acquisition of knowledge about numbers and arithmetic. It is widely assumed that numeracy is rooted on the "number sense", a core ability to grasp numerical quantities that humans share with other animals and deploy spontaneously at birth. To probe the links between number sense…
Descriptors: Mathematics Education, Learning Disabilities, Disability Identification, Numbers
Canobi, Katherine H.; Bethune, Narelle E. – Cognition, 2008
Three studies addressed children's arithmetic. First, 50 3- to 5-year-olds judged physical demonstrations of addition, subtraction and inversion, with and without number words. Second, 20 3- to 4-year-olds made equivalence judgments of additions and subtractions. Third, 60 4- to 6-year-olds solved addition, subtraction and inversion problems that…
Descriptors: Numbers, Computation, Subtraction, Arithmetic
Campbell, Jamie I. D.; Metcalfe, Arron W. S. – Cognition, 2008
There is evidence for both semantic and asemantic routes for naming Arabic digits, but neuropsychological dissociations suggest that number-fact retrieval (2x3=6) can inhibit the semantic route for digit naming. Here, we tested the hypothesis that such inhibition should slow digit naming, based on the principle that reduced access to multiple…
Descriptors: Numbers, Reaction Time, Semantics, Subtraction
Flombaum, Jonathan I.; Junge, Justin A.; Hauser, Marc D. – Cognition, 2005
Mathematics is a uniquely human capacity. Studies of animals and human infants reveal, however, that this capacity builds on language-independent mechanisms for quantifying small numbers ([less than] 4) precisely and large numbers approximately. It is unclear whether animals and human infants can spontaneously tap mechanisms for quantifying large…
Descriptors: Numbers, Animals, Infants, Arithmetic
Rousselle, Laurence; Noel, Marie-Pascale – Cognition, 2007
Forty-five children with mathematics learning disabilities, with and without comorbid reading disabilities, were compared to 45 normally achieving peers in tasks assessing basic numerical skills. Children with mathematics disabilities were only impaired when comparing Arabic digits (i.e., symbolic number magnitude) but not when comparing…
Descriptors: Symbols (Mathematics), Reading Difficulties, Mathematics Education, Learning Disabilities