Developmental dyscalculia: assessment of number representation by the ZAREKI-R

Paulo Adilson da Silva Flávia Heloísa dos Santos About the authors

This study investigated which aspects of number processing and calculation and working memory are related to arithmetic deficits. The participants were children aged from 9 to 10 years, both gender, divided in two groups based on their calculation score: a group without arithmetic disability (SDA; N=11) and with arithmetic disability (CDA; N=19); assessed by the instruments: ZAREKI-R, Raven's Coloured Progressive Matrices, Block Span, Digit Span, and CPR (pseudowords repetition). CDA children exhibited slightly lower scores than SDA on intellectual level and Block Span, and deficits in dictation of numbers, mental calculation, and problem solving tasks of the ZAREKI-R. The results indicate that CDA children have specific deficits in visuospatial working memory and performed poorly in number representation tasks, which fulfill criteria for Developmental Dyscalculia.

Developmental Dyscalculia; Mathematic; Working memory; Neuropsychology; learning disabilities


Instituto de Psicologia, Universidade de Brasília Instituto de Psicologia, Universidade de Brasília, 70910-900 - Brasília - DF - Brazil, Tel./Fax: (061) 274-6455 - Brasília - DF - Brazil
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