Behavioral, neuropsychological, and brain imaging research points to a dedicated system for processing number that is shared across development and across species. This foundational Approximate Number System (ANS) operates over multiple modalities, forming representations of the number of objects, sounds, or events in a scene. This system is…

Evaluates the effects of a training procedure based on the organizational disequilibrium model of cognitive development. Subjects were children who displayed pretest structural profiles of varying levels of structural elaboration. (DP)

This paper questions the assumption that a central processing deficit exists in the speed of performing mental operations by children as compared to adults. Two hypotheses are proposed and data are cited as evidence. (JMB)