The Flynn Effect is a well documented phenomenon demonstrating score increases on IQ measures over time that average about 0.3 points per year. Normative adjustments to scores derived from IQ measures normed more than a year or so prior to the time of testing an individual have become controversial in several settings but especially so in matters…

Investigated canonical relationship of the Wechsler Intelligence Scale for Children-Revised Verbal and Performance scales. Found relationship to be similar to that of the Wechsler Adult Intelligence Scale-Revised, but less strong. Found two scales shared 46 percent of their variance. Results support independent interpretation of the Verbal and…

Describes a method that uses age equivalents and standard scores to recreate the full range of variability in the scores of low-functioning individuals. The method allows for a more complete interpretation of performance that can lead to better educational and therapeutic programming. (Author/MCF)

Compared regression lines for prediction of Wide Range Achievement Test scores by Wechsler Intelligence Scale for Children and revised WISC Full Scale IQs across race. Results support the use of a common regression line in the prediction of achievement scores for races. (Author)

A. S. Kaufman (1994) recommended that clinicians substitute Symbol Search, a new subtest, for the Coding subtest when calculating Performance and Full Scale IQs on the Wechsler Intelligence Scale for Children-III. Tables are provided for accurate derivation of IQs, percentile ranks, and confidence intervals when this substitution is made. (SLD)

The cultural test bias hypothesis represents the contention that all ethnic or racial group differences on mental tests are due to inherent, artifactual biases produced within the tests through flawed psychometric methodology. This address focuses on an empirical evaluation of the cultural test bias hypothesis, especially emphasizing the construct…

Investigated the criterion-related validity of the Kaufman Assessment Battery for Children (K-ABC), predicting reading comprehension, arithmetic, and general achievement, for large samples of blacks and whites tested during the standardization of the battery. The Sequential and Mental Processing Composite scales tended to overpredict black…

Samples in research on individual and group differences may be selected based on whole scores which differ from the population mean. Children are diagnosed in clinical practice with a whole score. These procedures produce regression to the population mean which can affect accuracy and adequacy of part score interpretations. (Author/DWH)

The apparent stability of the three-factor solution across sex and age supports the interpretation that Wechsler Intelligence Scale For Children-Revised (WISC-R) factor scores are independent of child's sex and age. Construct validity is documented across numerous demographic variables. (Author)

Investigated factor structure of the Stanford-Binet Fourth Edition using collaboration matrix from the standardization sample of 1,695 children aged 2 through 6 years, 1,586 children aged 7 through 11 years, and 1,728 participants aged 12 through 23 years. The results revealed the large first factor that resembled general intelligence, with little…

Intelligence quotient (IQ) differences among groups according to sex, and demographic and other variables have been explored for a variety of intelligence tests. This investigation analyzed data from the standardization sample for the 1981 Wechsler Adult Intelligence Scale-Revised (WAIS-R) to determine the relationship of WAIS-R IQs to the…

Wechsler Intelligence Scale for Children-Revised Verbal, Performance, and Full Scale IQs for matched-pair subjects were compared, evaluating performance in morning and afternoon testing. No significant differences in mean IQ as a function of time of testing were shown. Greater variability occurred for morning performance on the Verbal and Full…

Factor analyses of the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) was conducted. The random sample included 100 boys and 100 girls beginning at age four with increments of 6 months up to age 6 1/2. The intercorrelation matrix of the 11 WPPSI subtests at each of the age levels was factor analyzed, and the percent of common,…

Explored the relationship between age and intelligence test performance across race and evaluated the developmental progression of scores and construct validity of the Kaufman Assessment Battery for Children in a sample totaling 2,615 children. No significant race or sex differences were found, supporting the validity of the K-ABC. (JAC)

Six methods of measuring factorial similarity were compared with regard to outcome based on two large data sets, one for an intelligence test and the other for a personality test. All indexes yielded comparable results. Comparing factors determined at random, all indexes yielded comparable results leading to a conclusion of dissimilarity.…