International Journal of Psychology vol:43 issue:3-4 pages:246-246
International Conference of Psychology edition:19 location:Berlin, Germany date:20-25 July 2008
It has been proposed that dyscalculia emerges due to impairments in basic number processing. We examined this hypothesis in Velo-Cardio-Facial Syndrome, a genetic disorder with a high prevalence of dyscalculia. Twenty-five children with VCFS and 25 individually matched controls participated. Children with VCFS showed a consistent pattern of deficits in number comparison, large addition/subtraction and the use of procedural back-up strategies, indicating an impaired quantity subsystem and intraparietal dysfunction. However, the verbal subsystem (number reading, multiplication and fact retrieval) was preserved. Furthermore, correlational data showed that basic number processing skills directly accounted for single-digit arithmetic performance and strategy use.