The Development of Children's Ability to Balance Objects on a Fulcrum: Examining Karmiloff-Smith's Model of Cognitive Development.

Investigates predictions derived from the Karmiloff Smith framework for understanding the process of cognitive development. Finds broad support for the model but also indicates that behavior for some tasks is more variable than expected; and, contrary to expectations, that more abstract tasks did not disrupt behavior to any large extent. (DSK)