title: Spatial and numerical processing in children with non-verbal learning disabilities.
abstract: Consistently with the idea that numbers and space interact with each other, the present paper aimed to investigate the impact of non-verbal learning disabilities (NVLD) on spatial and numerical processing. In order to do so, 15 NVLD and 15 control children were required to perform different spatial (the line bisection and Simon tasks) and numerical tasks (the number bisection, number-to-position and numerical comparison tasks). In every task, NVLD children presented lower accuracy scores than the control group. While both groups manifested similar pseudo-neglect and Simon effects, they however differed in the numerical comparison task: while control children presented the standard SNARC effect in the uncrossed and crossed postures, no SNARC effect was observed in the NVLD group. Our results therefore suggest that NVLD affects the accuracy and the nature of the mental number line by decreasing its precision and the saliency of its left-to-right orientation.
authors: Institut de Recherche en Sciences Psychologiques (IPSY), Centre de Neuroscience Système et Cognition (NeuroCS), Université Catholique de Louvain, Place Cardinal Mercier 10, B-1348 Louvain-la-Neuve, Belgium. Electronic address: virginie.crollen@uclouvain.be.
authors: Virginie
authors: V
authors: Crollen
authors: Institut de Recherche en Sciences Psychologiques (IPSY), Centre de Neuroscience Système et Cognition (NeuroCS), Université Catholique de Louvain, Place Cardinal Mercier 10, B-1348 Louvain-la-Neuve, Belgium.
authors: Camille
authors: C
authors: Vanderclausen
authors: L'ADAPT, Rue Pajol 2, 75018 Paris, France.
authors: Florence
authors: F
authors: Allaire
authors: Support en Méthodologie et Calcul Statistique (SMCS), Université Catholique de Louvain, Voie du Roman Pays 20, B-1348 Louvain-la-Neuve, Belgium.
authors: Arnaud
authors: A
authors: Pollaris
authors: Institut de Recherche en Sciences Psychologiques (IPSY), Centre de Neuroscience Système et Cognition (NeuroCS), Université Catholique de Louvain, Place Cardinal Mercier 10, B-1348 Louvain-la-Neuve, Belgium.
authors: Marie-Pascale
authors: MP
authors: Noël
mesh_terms: D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D003071:Cognition; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000503:physiopathology / Q000523:psychology*; D008297:Male; D008433:Mathematics; D065855:Spatial Processing
keywords: Non-verbal learning disability; Numerical cognition; Spatial representation