Asymmetrical interference between number and item size perception provides evidence for a domain specific impairment in dyscalculia.

ABSTRACT: Dyscalculia, a specific learning disability that impacts arithmetical skills, has previously been associated to a deficit in the precision of the system that estimates the approximate number of objects in visual scenes (the so called 'number sense' system). However, because in tasks involving numerosity comparisons dyscalculics' judgements appears disproportionally affected by continuous quantitative dimensions (such as the size of the items), an alternative view linked dyscalculia to a domain-general difficulty in inhibiting task-irrelevant responses. To arbitrate between these views, we evaluated the degree of reciprocal interference between numerical and non-numerical quantitative dimensions in adult dyscalculics and matched controls. We used a novel stimulus set orthogonally varying in

SUBMITTER: Castaldi E 

PROVIDER: S-EPMC6294370 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature