Unimpaired groupitizing in children and adolescents with dyscalculia.

When asked to estimate the number of items in the visual field, neurotypical adults are more precise and rapid if the items are clustered into subgroups compared to when they are randomly distributed. It has been suggested that this phenomenon, termed "groupitizing", relies on the recruitment of arithmetical calculation strategies and subitizing. Here the role of arithmetical skills in groupitizing was investigated by measuring the groupitizing effect (or advantage) in a sample of children and adolescents with and without math learning disability (dyscalculia).

Neurorehabilitation applied to specific learning disability: Study of a single case.

Background: Specific Learning Disorders (SLD) therefore represent chronic, not temporary disorders with varying degrees of expression throughout life. The beginning of imaging, anatomy and genetics studies have made it possible to investigate the brain organization of individuals suffering from SLD (Deheane, 2009).

Objectives: The purpose of this paper is to describe a treatment method for reading and writing disorders through an intervention based on the integration of a sublexical method and a neuropsychological approach, with assistive technologies in the study of a single case.