title: Mathematical difficulties in nonverbal learning disability or co-morbid dyscalculia and dyslexia.
abstract: The main goal of the present study was to shed further light on the weaknesses of children with different profiles of mathematical difficulties, testing children with nonverbal learning disability (NLD), co-morbid dyscalculia and dyslexia (D&D), or typical development (TD). Sixteen children with NLD, 15 with D&D, and 16 with TD completed tasks derived from Butterworth (2003 ) and divided into: a capacity subscale (i.e., a number-dots comparison task, a number comparison task, and a dots comparison task); and an achievement subscale (i.e., mental calculations and arithmetical fact retrieval). Children with NLD were impaired in the dots comparison task, children with D&D in the mental calculation and arithmetical facts.
authors: Department of Developmental and Social Psychology, University of Padova, Padova, Italy. irene.mammarella@unipd.it
authors: Irene C
authors: IC
authors: Mammarella
authors: Monica
authors: M
authors: Bomba
authors: Sara
authors: S
authors: Caviola
authors: Fiorenza
authors: F
authors: Broggi
authors: Francesca
authors: F
authors: Neri
authors: Daniela
authors: D
authors: Lucangeli
authors: Renata
authors: R
authors: Nacinovich
mesh_terms: D000124:Achievement; D000704:Analysis of Variance; D002648:Child; D015897:Comorbidity; D002658:Developmental Disabilities; D060705:Dyscalculia; D004410:Dyslexia; D005260:Female; D006801:Humans; D008297:Male; D055641:Mathematical Concepts; D008570:Memory, Short-Term; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D011340:Problem Solving / Q000502:physiology*; D011597:Psychomotor Performance; D013647:Task Performance and Analysis