Background: Evidence suggests that, as a group, patients with schizophrenia have intellectual deficits that may precede the manifestation of psychotic symptoms; however, how successfully intelligence tests are able to discriminate schizophrenia from other psychotic disorders has yet to be investigated in detail. Methods: Using Wechsler Adult…

Created an adaptation of the Digit Symbol subtest of the Wechsler Adult Intelligence Scale, the Digit Symbol Rotation test, and evaluated its "g" loading with 54 adults. Results suggest the Digit Symbol Rotation test has more factorial validity than Digit Symbol, but remains equally easy to administer and score. (SLD)

The interview with Elizabeth Hagen, the co-creator of the Cognitive Abilities Test and a revisor of the Stanford-Binet Intelligence Test, deals with such issues in gifted education as general intelligence vs. specific abilities, validity of test scores at the preschool level, and misconceptions about retesting gifted students. (Author/CL)

The criterion validity of the factor index scores of the third edition of the Wechsler Intelligence Scale for Children (WISC-III) was evaluated in a sample of 88 children with traumatic head injury. Only the Perceptual Organization and Processing Speed scores demonstrated acceptable sensitivity to injury severity for evaluation use. (SLD)

This paper reviews what is known about intelligence and the use of intelligence tests. Environmental and hereditary factors that affect performance on intelligence tests are reviewed, along with various theories that have been proposed about the basis of intelligence. Intelligence tests do not test intelligence per se but make inferences about a…

The primary goal of this study was to investigate the underlying structure of the Differential Ability Scales (DAS) using Exploratory Principal Axis Factoring (PAF) with 62 nonclinical preschoolers. While previous factor analyses of the DAS Core subtests revealed the derivation of two distinct factors, the current results revealed only one factor,…

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…

The current study examines the views of experts in the science of mental abilities about the primacy and uniqueness of "g" and the social implications of ability testing, and compares their responses to the views of a group of non-expert psychologists. Results indicate expert consensus that "g" is an important, non-trivial determinant (or at least…

The Kaufman Brief Intelligence Test (K-BIT) was used as a screening instrument to predict Wechsler Intelligence Scale for Children-Third Edition (WISC-III) scores of 94 students referred for psychoeducational evaluations. Although the correlation coefficient between the K-BIT IQ Composite and the WISC-III Full Scale IQ was 0.771 for the entire…

As a response to recent public debate about the nature of intelligence, this article reviews the "state of the art" in the study of intelligence, exploring significant conceptualizations of intelligence, the use and interpretation of intelligence tests, racial or ethnic differences in intelligence, and major issues yet to be resolved.…

Validity studies conducted with the Stanford Binet Intelligence Scale: Fourth Edition (SB:FE) are reviewed. Results support its validity as a measure of general mental ability and that it can distinguish between groups of youngsters with differing intellectual abilities. Recommendations are made for use of the SB:FE. (SLD)

Two projective measures of object representations, the Concept of the Object on the Rorschach and the Social Cognition and Object Relations Scales, were compared with each other and measures of intelligence and pathology with 15 children and 94 adult patients. Results support the construct validity of object representations. (SLD)

Compared area scores from short-form version of Stanford-Binet Intelligence Test (Fourth) with those from long form for 33 gifted children. Found three of five mean difference contrasts were significantly different and correlation coefficients between corresponding area scores and Test Composite were statistically significant. Suggests that…

Factor-analyzed data are reported from the Kaufman Adolescent and Adult Intelligence Test for 1,535 whites, 226 African Americans, and 140 Hispanics. Factor structures yielded Fluid and Crystallized dimensions that were congruent across race and ethnic groups and provided construct validity for each subsample. (SLD)

Intersubtest scatter on the Wechsler Adult Intelligence Scale-Revised for China (WAIS-RC) for 1,979 subjects was evaluated and compared with that of the WAIS-R standardization sample. Findings were similar, and differences in scatter range may be explained by cultural differences in values, educational approaches, and educational opportunities.…