The majority of recent studies conclude that children's private speech development (private speech internalization) is related to and important for mathematical development and disabilities. It is far from clear, however, whether private speech internalization itself plays any causal role in the development of mathematical competence. The main…

Causal statements from adults with learning disabilities and normally achieving adults were analyzed and organized within a linguistic taxonomy of causal semantic relations, and a relationship between Piagetian cognitive stages and verbal expressions of causality were identified. Piagetian principles were used to design assessment and intervention…