The results of studies regarding intelligence in infancy are reviewed, and are compatible with Sternberg's findings on intelligence in adulthood. It is suggested that a major aspect of intelligence--attitude toward and performance with novel kinds of concepts--is continuous in nature throughout the life span, but requires different measurement…

Demonstrated is a covariance principle that causes the observer to assume that if one aspect of a two-dimensional figure (its perimeter or its area) is conserved, the other aspect must also be conserved (pseudo-conservation). Mentally retarded individuals, assuming no such fixed relationship, correctly judged the changed state of the nonconserved…

The history of the concept of intelligence is reviewed, and the construction and uses of psychological tests are explored. Skills consist of a large number of abilities. It is argued that the psychological entity, intelligence, is determined by particular contexts, contexts often induced by social demands. (SLD)