Because no single characteristic defines intelligence, there can be no adequate process-based definition of intelligence. In principle, a combination of many empirically derived measures into a single index, as in a Binet test, would be appropriate. In practice, many of the relevant characteristics are simply impossible to measure. (Author/RD)

The validity of the Slosson Intelligence Test (SIT) relative to the California Short Form Test of Mental Maturity and the Shipley-Institute of Living Scale was investigated on a sample of college students. Results supported the validity of the SIT. (Author/JKS)

The issue of factor indeterminacy in factor analysis has been the subject of considerable debate in recent years. The same issue was also discussed widely in the 1920s and 1930s. The history of the issue, the literature on the subject, and parallels between early and modern work are discussed. (Author/JKS)

Four models of intellectual abilities were evaluated using confirmatory factor analysis and data from 197 children referred for a gifted program who took the Kaufman Assessment Battery for Children (K-ABC). All four models were a possible fit, but the best understanding came from a model posited on a theory of fluid-crystallized abilities. (SLD)

Studied whether mediated learning experience would improve the scores of African students on Raven's Standard Progressive Matrices. Seventy African and 28 non-African college students in South Africa were given the Raven's Progressive Matrices on 2 occasions, and some subjects were exposed to the mediated learning experience. Both groups improved…

Tested whether alpha power in different sub-bands is selectively related to intelligence. For 74 Austrian subjects, the EEG was recorded during a resting session and 2 different intelligence tests were performed. Findings show a strong positive correlation between intelligence and alpha power. (SLD)

Investigates long-term stability of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) for children with specific learning disability (SLD), serious emotional disability (SED), and mental retardation (MR). There were no differential effects of disability groups on long-term stability coefficients. Stability coefficients for Full…

The Wechsler Intelligence Scale for Children-Third Edition (WISC-III) and the Stanford-Binet Intelligence Scale-Fourth Edition (SB-IV), were administered to 20 gifted children and 20 non-gifted children to examine the extent of the difference in IQ scores obtained on the two tests. Results show that the SB-IV Composite Score was significantly…

Studied the complementary nature of Illinois Test of Psycholingusitic Abilities (ITPA) and Wechsler Intelligence Scale for Children Revised (WISC-R) in a sample of 60 language-impaired children. Results suggest that the ITPA is more sensitive to differences in children's verbal and performance abilities than the WISC-R. (SLD)

Studied the factors underlying the aging effects seen on the Wechsler Intelligence Scale for Adults-Revised (WAIS-R) and the scale's third edition (WAIS-III) using the French standardization samples of 1,104 for the WAIS-III and 1,000 for the WAIS-R. Results show that the observed decline in scores for both tests cannot be fully explained with a…

The article reviews the development of infant cognitive assessment and describes selected tests. Considerations in choosing, administering, and interpreting the results of infant intelligence/cognitive assessment instruments are outlined. The usefulness of cognitive assessment is discussed as are new approaches to assessment. (Author/DB)

This study of 60 special education children found that Wechsler Intelligence Scale for Children-III (WISC-III) scores correlated significantly and positively with the Wide Range Achievement Test-3 (WRAT-3). Correlations between the two tests were much higher than those reported in test manuals. Mean WISC-III scores were consistently higher than…

Discusses Bauman's (1991) evaluation of stability of Wechsler Intelligence Scale for Children (Revised) IQs in children with learning difficulties. Argues that some procedures produced magnified estimates of instability. Presents reanalysis of data that suggests that, although stability coefficients were high, approximately 25 percent of sample…

D. K. Detterman and M. H. Daniel's recognition (1989) that intertest correlations for intelligence quotient (IQ) might not be uniform across the range of ability (and age) was anticipated by C. E. Spearman (1904). Detterman and Daniel appear to have rediscovered Spearman's suggested law of diminishing returns. (SLD)