Volume five continues to mark the significant advances made in the psychology of human intelligence, problem solving, and thinking abilities. Papers contributed by leaders in the field reflect a diversity of perspectives and approaches to the human intelligence. Subjects discussed include: * genetic and environmental contributions to information-processing abilities

* development of children's conceptions of intelligence

* skill acquisition as a bridge between intelligence and motivation

* information-processing abilities underlying intelligence

* costs of expertise and their relation to intelligence

* the nature of abstract thought