title: Introduction: Special section on mathematical development.
authors.forename: Ann
authors.initials: A
authors.lastname: Dowker
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002657:Child Development / Q000502:physiology*; D002675:Child, Preschool; D003071:Cognition; D003423:Critical Period, Psychological; D006801:Humans; D008433:Mathematics; D011581:Psychological Tests; D018980:Williams Syndrome / Q000523:psychology*