This study was designed to test the reliability of five major models of the structure of cognitive abilities. A battery of 16 tests was administered to 1000 Swedish sixth graders. Based on the results, a three-level hierarchical LISREL-based model (the HILI-model) is suggested. (Author/EGS)

An historical overview of investigations concerned with delineating the structure and composition of infant intellectual activity is presented. Earlier conceptualizations characterized infant intelligence as a unitary trait or factor. Recent studies contend that infant intellectual activity is comprised of varied sets of relatively independent…

The "factor" analyses published by Schultz, Kaye, and Hoyer (1980) confused component and factor analysis and led to unwarranted conclusions. The principal factors method yields two factors which support the a priori expectation of a difference between intelligence tasks and spontaneous flexibility tasks. (Author/RD)

The construct of general intelligence is discussed in the context of factor models, differential validity of tests, Piagetian tasks, heritability, social class, and race. The general factor is an abstraction resulting from genes, environmental pressures, and neural structures involved in cognitive or intellectual human behavior. (Author/RD)