The analysis of WISC scores for 314 school-age twins and 221 of their siblings revealed high concordance of full-scale and verbal IQ for monozygotic twins. The IQ concordance for dizygotic twins, twin-sibling pairs, and sibling pairs were comparable to each other but significantly lower than that for monozygotic twins. (Author/JMB)

Comparison of performance of nine groups of mentally retarded subjects (N=236) on the Wechsler Intelligence Scale for Children Scale-Revised (WAIS-R) indicated the WAIS-R produced higher IQs than the WISC-R and that this disparity increased as WISC-R IQ decreased. (Author/DB)

The social quotient from Vineland Social Maturity Scale was found to be moderately associated with IQ as measured by the Stanford Binet, Wechsler Adult Intelligence Scale, Peabody Picture Vocabulary Test, Slosson Intelligence Test, and the Leiter International Test for institutionalized mentally retarded persons. (CL)

A true-false measure concerning the interpretation of intelligence quotients (IQ) is presented. The correct responses to the 10 items, and a brief explanation of each, are also included. The author attempts to reveal many misconceptions about the interpretation of IQ scores. (DWH)

Investigated whether average Full Scale IQ (FSIQ) differences can be attributed to "g" using the Spanish standardization sample of the Wechsler Adult Intelligence Scale III (WAIS III) (n=703 females and 666 men). Results support the conclusion that WAIS III FSIQ does not directly or exclusively measure "g" across the full range…

Presents table for determining relative rarity of quotient discrepancies on Wechsler Intelligence Scale for Children-Revised (WISC-R) to be used with children at higher Intelligence Quotient levels. Theoretically derived table has been confirmed through empirical observation of WISC-R standardization sample. Suggests table use should reduce…

This guide provides a basic overview of 16 child nonverbal IQ measures and uses a set of specified criteria to evaluate them in terms of their psychometric properties. In doing so, the goal is neither to validate nor to criticize current uses of IQ but to (a) familiarize clinicians and investigators with the variety of nonverbal IQ measures…

In this study, long-term intellectual functioning and school-related behavioural outcomes were assessed in a patient sample that underwent invasive treatment for congenital heart disease (ConHD) between 1990 and 1995. The Wechsler Intelligence Scale for Children-Revised was used to measure intellectual functioning and the Teacher's Report Form to…

Although attention has been given to the intellectual functioning of children with attention-deficit/hyperactivity disorder (ADHD) relative to their non-ADHD peers, few studies have examined intellectual functioning in adults with ADHD. The purpose of the current investigation was to examine differences in intellectual ability between adults with…

Author explained what the quotient in IQ stands for, whether the IQ changes, how to relate IQ to other factors, and its future in measuring human intelligence and personality development. (RK)

The author discusses some controversial issues in regard to IQ testing and the relationship between intelligence and race. (IM)

An argument that Binet must be regarded as a major theoretician of functional intelligence and should be considered for what is regarded as classical intelligence theory is advanced. A discourse on Binet's theory, its intellectual context and the developments it fostered is given. (JL)

Psychometric g is by far more highly correlated with all tests conventionally called "IQ," cognitive abilities, and the like, than any other single factor or combination of other factors independent of g. Researchers must now examine the nature of psychometric g, including its causal underpinnings. (LMO)

Paper discusses advantages and disadvantages of using the Leiter International Performance Scale with autistic children and presents the results of a study comparing the performance of 18 autistic children on the Wechsler Intelligence Scale for Children-Revised and the Leiter. Results showed a high positive correlation between the WISC-R…