Four basic assumptions of IQ tests - age constancy, scholastic validity, standard environment and performance suggiciency are alien to Piaget's theory. Heredity cannot be statistically separated from environment; therefore, Piagetian theory would suggest the nature-nurture controversy is devoid of meaning. (ST)

Prenatal exposure to the Dutch famine of 1944-45 had no detectable effects on the adult mental performance of surviving male offspring; birth weight was not related to mental performance; and the association of social class with mental performance was strong. (AL)

Research and metaanalyses suggest fundamental commonalities among measures of cognition, affect, and conation, yielding trait complexes that are differentially related to career choices and intellectual development. A counseling framework involves movement away from typological representations of vocational and avocational interests,…

Despite its failings, Herrnstein and Murray's "The Bell Curve" is valuable for emphasizing cognition as significantly affecting human performance and social achievement; acknowledging human differences; and offering a frightening depiction of contemporary American society. The authors err in reducing intelligence to a stable, immutable…

Suggests that the iconic memory impairment of retarded subjects is attributable in part to mental retardation and not simply to low mental age. (Author/ED)

A critical review. Evidence supporting the sibling-tutoring explanation is evaluated and alternatives are presented. Alternatives include age spacing as an explanation for the intelligence discontinuity of last borns, and the idea that only children are more likely to come from single-parent homes. (BB)

It was concluded that while retinoblastoma per se is not associated with intellectual superiority or inferiority, retinoblastoma associated with blindness may result in selective cognitive superiority. (Authors)

Theoretical predictions, based on the confluence model, were made for data from six national surveys of intellectual performance, each relating intellectual performance scores to family configuration variables. The confluence model was capable of accurate prediction in all cases when three parameters were estimated. (Author/RD)

The purpose of this article is to disclose and comment upon some of the conceptual and empirical confusions that confront a revised concept of intelligence which sees intelligence as general skill(s) that can be directly taught rather than as a relatively fixed ability. Implications for teaching thinking skills are discussed. (IAH)

Virtual twins are unrelated siblings of the same age who are reared together from early infancy (UST-SA). Study uses a sample of 90 UST-SA pairs to comparatively assess the similarity of IQ subtest profile correlations for UST-SAs and twin pairs. Findings support explanatory models of intelligence that include genetic factors, demonstrating that…