Evidence from twin studies points to substantial environmental influences on intelligence, but the specifics of this influence are unclear. This study examined one developmental process that potentially causes intelligence differences: learning to read. In 1,890 twin pairs tested at 7, 9, 10, 12, and 16 years, a cross-lagged…

Instructional management focuses on planning, execution and evaluation of learning experiences. For teachers in pre-secondary schools to plan, execute and evaluate learning experiences effectively, they need to have good understanding of the process of cognitive development in children. Piaget has postulated that children progress through a series…

This study examines development along Perry's intellectual and ethical scale among three successive graduating classes of students identified as gifted and talented in mathematics and science. Perry posits that intellectual development proceeds from a basic dualism through nine stages ("positions") and culminates with a sense of personal identify…

Article discusses problems associated with promoting intellectual growth in adulthood. Defines characteristics of intelligent behavior as incorporating individual attainment of Resources, Intimacy, Competence, and Health (RICH). Presents the RICH theory as a way to define and address the goals of intelligent enhancement. (JDM)

Discusses the theories of Piaget, Bruner, Lifschitz and Langford, Vygotsky and others. (SB)

In an attempt to make Vygotsky's theories more accessible, Wertsch in "Vygotsky and the Social Formation of Mind" takes significant liberties with the original works. That leads to serious errors and moves the focus away from the author's own psychological theories. (PS)

This article (1) discusses the progression of children's thought from realism to objectivity, to reciprocity, and to realitivity; and (2) describes seventeen types of explanations children give to explain the causality of physical occurrences in the world. (SB)

This paper helps to clarify the role of empirical evidence in psychological and epistemological theories. Following Galileo's idealization, epistemological theories do not describe the behavior of individuals in the real world. It is only when the "impediments" of the real subjects are gradually removed by experimental manipulation that…

Summarizes recent research which attempted to discover what children of different ages know about the appearance-reality distinction and related phenomena. Findings show that what helps children grasp the distinction is an increased cognizance of the fact that people are sentient subjects who have mental representations of objects and events. (PS)

Reports a two-year longitudinal study of 55 adolescents and young adults who were divided into three groups and given Reflective Judgment Interviews and the Concept Mastery Test to investigate sequentiality of reflective judgment stages. Results indicate support for seven hypothesized shifts in epistemic assumptions over time.(Author/RH)

A sex-related difference, favoring boys, was found on initial performance of two samples (one British, one American) of 10- and 11-year-old children on tasks involving volume and density. After classroom instruction that included opportunities for interaction with appropriate materials, both sexes performed at higher levels but differences…

Discusses the "neo-Piagetian" concepts of Juan Pascual-Leone which are present in Piaget's theory. The concepts presented are the repertoire of schemes, mental processing capacity, and field dependence-independence. (Author/SA)

A discussion of functional language proficiency considers several widely-accepted theories of cognition, draws parallels between specific stages of intellectual maturity and development of second language proficiency, and suggests ways in which teachers may be able to help students progress from one stage to another within the context of foreign…

Examines relationship between literacy and intellectual development and the belief that literacy leads to higher forms of thought. Describes research findings among the Vai of Liberia, a people who invented a syllabic writing system to represent their own language. Investigates effects of becoming literate separately from effects of attending…

William Perry's description of college students' stages of cognitive development is condensed into four classification categories, which are explained and told in an animal allegory. This presentation clarifies the theory for teacher use. (MSE)