The conceptual level, working memory capacity and domain-specific skills of two girls (aged 7 and 11 years old) and two boys (aged 9 and 10 years old) who displayed exceptional intellectual performance were investigated from Case's neo-Piagetian theoretical perspective. Five measures of conceptual level and two measures of working memory capacity…

Gifted and highly gifted girls in grades four to six were given Piagetian-type manipulative problem-solving tasks reflecting formal operations. Although Flavell suggested that a chronological age of 10 years was necessary for successful completion of these tasks, time allowed was a more valid predictor. (LMO)

This study investigates the nature and the factor structure of infant intelligence. The Bayley Mental Scale items were administered. According to the analysis, intelligence at any age is a set of separate mental abilities at each age, and there are a variety of paths through which mental development occurs. (JAZ)