The differentiation hypothesis suggests that the degree to which general intelligence ("g") pervades performance on mental tests is greater at lower ability levels. Analysis of data from Differential Aptitude Test results for over 10,500 Irish school children ages 14 to 17 years supports the differentiation hypothesis. (SLD)

Confirmatory factor analysis was used to test 3 models of the Wechsler Intelligence Scale for Children-III (2-, 3-, and 4-factor conceptualizations) for 11 age groups with 200 subjects per age group. The four-factor model is somewhat supported, but its theoretical or clinical importance is unclear. (SLD)

The Chinese revision of the Wechsler Adult Intelligence Scale was factor analyzed for 55 Chinese subjects with mental retardation. Results indicated a two-factor solution comprising Verbal Comprehension and Perceptual Organization factors. Analysis found no important differences in factor structure between the Chinese subjects and low-intelligence…

Introduces the confluence model as a theory specifying the process by which the intellectual environment modifies intellectual development. Using this model, explores the contradiction between prediction of secular trends in test scores by trends in aggregate birth order and the lack of prediction of individual test scores by birth order using…

Special educational methods need to develop beyond the diagnostic use of IQ tests. Individual differences in cognitive abilities of students need to be understood and need to be incorporated into effective individualized educational interventions. The goal is to raise the level of performance and the standard deviation of performance. (MMU)

The calculations of D. Schretlen, R. H. B. Benedict, and J. H. Bobholz for the reliabilities of a short form of the Wechsler Adult Intelligence Scale--Revised (WAIS-R) (1994) consistently overestimated the values. More accurate values are provided for the WAIS--R and a seven-subtest short form. (SLD)

There are several studies showing that working memory and intelligence are strongly related. However, working memory tasks require simultaneous processing and storage, so the causes of their relationship with intelligence are currently a matter of discussion. The present study examined the simultaneous relationships among short-term memory (STM),…

The Wechsler Adult Intelligence Scale--Third Edition (WAIS-III; D. Wechsler, 1997a) and the Wechsler Memory Scale--Third Edition (WMS-III; D. Wechsler, 1997b) are 2 of the most frequently used measures in psychology and neuropsychology. To facilitate the diagnostic use of these measures in the clinical decision-making process, this article…

Processing speed subtests are components of widely used intellectual assessment instruments. Many researchers interpret these measures as assessing a unitary construct, but there is a question concerning the constructs assessed by these measures and, ultimately, their interpretative utility. Coding and Symbol Search from the Wechsler Intelligence…

The aim of the current study was to compare the Wechsler Intelligence Scale for Children-Third Edition, UK adaptation (WISC-III[superscript uk]) scores of Indian primary school children when Indian and UK norms are used. The sample consisted of 300 primary school children, within the age range of 6 years to 10 years and 11 months. The children…

A new analysis of data from 15 cognitive tasks completed by 93 subjects with scores on the Cattell Culture Fair test show that differences in Cattell score systematically affected performance on some tasks more than on others. Implications for theories of local and global differences in mental ability are discussed. (SLD)

Fifty hearing-impaired elementary-school students completed the Kaufman-Assessment Battery for Children; scores correlated highly with scores from the Wechsler Intelligence Scale for Children-Revised and with school achievement. The Simultaneous Processing Scale and the Nonverbal Scale seemed appropriate for hearing-impaired children while the…

A survey of 97 school psychologists found that the majority felt they needed additional training in administering, scoring, and interpreting the fourth edition of the Stanford-Binet Intelligence Scale. Thirty-four percent were using the fourth edition. Rank ordering of instruments of choice was: Wechsler scales, Kaufman Scale, old Stanford-Binet,…

The study comparing the differential validity of the Kaufman Assessment Battery for Children (K-ABC) and the Stanford-Binet Intelligence Scale raised questions concerning the ability of the K-ABC to discriminate among at-risk preschoolers functioning in the lower ranges of cognitive ability. (Author/DB)

Sternberg and Gastel have provided an example of a major principle of intelligence research--the relationship between a task's working memory demands and its sensitivity to individual differences in fluid intelligence and "g." There is no need to invoke additional constructs such as "novelty." (SLD)