All of the children were presented conservation of liquid and weight problems and 12 metaphor items. The results suggest that hearing loss did not affect the solution of either conservation or metaphor. (Author)

A reanalysis of B. Inhelder's (1968) data concerning cognitive development among retardates was performed by selecting from the original 159 subjects a sample of 104 educable mentally retarded Ss (7-19 years old) who were diagnosed as fixated or nonfixated at three of the cognitive stages postulated by Jean Piaget. The results indicated that among…

Compared the performance of 29 institutionalized cultural-familial mental retardates on Piagetian conservation tasks. Examined the effects of age, sex, and degree of retardation on conservation performance. (BD)

Normal infants were administered the Bayley Scales of Infant Development at 6 months and the Stanford-Binet Intelligence Scale at 3 years. At 6 months the quality of stimulation found in the early environment was measured. Results indicate that home environment may contribute to instability of performance on infant tests. (GO)

This report discusses the outcomes of a study that examined 216 comparably aged children and adolescents (ages 2-18) with fragile X or autism to determine whether longitudinal change in cognitive ability and adaptive behavior was similar in the two groups. Results found decreases in Intelligence Quotient scores in young children with fragile X as…

This inquiry had two aims: to assess children's ability to interpret maps in geography; to relate the assessed ability to maturity of thought as proposed by Peel, general intelligence, and age. It was found that performance on four tests depended more on intelligence than on maturity of thought or age. (Author/SJL)

A study of 700 children (ages 5-12) investigated whether children's conceptions of and expectations of friendship are determined by chronological age or by mental age. Results found children of differing intellectual abilities pass through the five conception stages of friendship at different ages and at different rates. (Contains 4 references.)…

Army alpha longitudinal data on the same 96 males tested in 1919, 1950, and 1960 were analyzed in addition to data on 123 undergraduates tested in 1972-4. Young adults in 1919 and 1970 were similar. Results suggest that traditional factor analysis taxonomies for young adults misrepresent elderly persons. (Author/CP)

The confluence model of cognitive development was tested on 7,060 children. Family size, sibling order within family sizes, and hypothesized age-dependent effects were tested. Findings indicated an inverse relationship between family size and the cognitive measures; age-dependent effects and other confluence variables were found to be…

Reports on the findings of a comparative study of mental abilities of Mexican and American children. Discusses age, sex, social class, and urban-rural differences, as well as cultural differences. (SS)

Two studies were designed to examine the relationship between moral judgment and role-taking in young children. In Study I, 30 lower class and 30 middle class five-year-olds were presented with affective, cognitive and perceptual role-taking tasks. Task performances were then examined in relation to four dimensions of moral…

This paper discusses research exploring the performance factors involved in studies which test for formal operations. It is suggested that several previous studies dealing with formal operations confound performance and competence in determining the extent of subjects' formal operations schemata. Factors which might account for performance…

This paper reviews studies in which scores on Piagetian tests of logical thought were correlated with IQ, mental age (MA) and chronological age (CA), and examines the possible effects of the size of the age range and mean age of subjects on these correlations. The data included 44 groups of subjects obtained from 36 studies in which Piagetian and…