This article discusses the issues of the basic processes underlying intelligence, considering both historical and contemporary perspectives. The attempt to elucidate basic processes has had, at best, mixed success. There are some problems with pinpointing the underlying basic processes of intelligence, both in theory and as tested, such as what…

In this article, I describe the 21 ideas underlying a 42-year search to understand giftedness. I present the ideas roughly chronologically, in the order in which they arose, and discuss how in a career as in science, progress means supplementing or even superseding one idea with the next. In terms of the 21 ideas, I start with a discussion of how…

In this report, three theories of transitive inference are compared as they apply to the solution of linear syllogisms: a spatial theory, a linguistic theory, and a new mixed linguistic-spatial theory. Each theory is expressed in terms of an information-processing (flow chart) model and a mathematical model that quantifies the…

The article describes the triarchic theory of human intelligence, which is composed of three subtheories: componential, experiential, and contextual. Deficient cognitive strategies and inadequate knowledge in certain domains may result from the inability of the learning disabled to selectively encode, compare, and combine information, or from an…