Multiple regression data using the WISC-R and the Woodcock-Johnson tests of cognitive ability

Using a sample of 100 behavior disordered male adolescents, correlations between the Wechsler Intelligence Scale for Children-Revised (WISC-R) and the Woodcock-Johnson Tests of Cognitive Abilities (WJTCA) were computed. All WISC-R subtests correlated with the W-J Broad Cognitive Ability score at the .0001 level. Analysis of the forward selection multiple regression procedure resulted in the inclusion of only WISC-R Verbal subtests for the first six steps. Implications of such results were discussed and a predictive equation reported.     

Correlations between the Woodcock-Johnson and the WISC-R for a behavior disordered population

Correlations between the Woodcock-Johnson Test of Cognitive Abilities (WJTCA) and the Wechsler Intelligence Scale for Children-Revised (WISC-R) were evaluated on a sample of 55 behavior disordered males, 28 of whom were also diagnosed as learning disabled. Concurrent validity for this sample was demonstrated by only a 2.33 point difference between the mean WJTCA Broad Cognitive score and the mean WISC-R Full Scale IQ score. Analysis of Pearson product-moment correlations between each WISC-R subtest and each Woodcock-Johnson cluster score substantiated previous assertions that the WJTCA is unduly weighted with Product-Dominant factors. Construct validity of some of the WJTCA clusters also was questioned. Implications of these results for behavior disordered populations were discussed.     

The relationship between the Woodcock-Johnson psycho-educational battery-revised (early development) and the Wechsler preschool and primary scale of intelligence-revised

The concurrent validity between the Woodcock-Johnson Psycho-Educational Battery-Revised Tests of Cognitive Ability (WJ-R, COG) (Early Development) and the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R) was examined. These two measures were administered in two separate sessions in counterbalanced order to 30 normal 3-, 4-, and 5-year-old subjects from the Midwest. Findings suggested that the WJ-R Broad Cognitive Ability (BCA) and the WPPSI-R Full Scale IQ (FSIQ) and Verbal IQ (VIQ) were significantly correlated, but that the mean BCA scores on the WJ-R (COG) were significantly below the mean FSIQ scores on the WPPSI-R by only - 4.50 standard score points. No age or sex differences were found on either the WJ-R (COG) or the WPPSI-R. Significant correlations were found between the WJ-R (COG) BCA and the following WJ-R (COG) Broad Ability Factor scores: Long-Term Retrieval, Short-Term Memory, Auditory Processing, and one test called Picture Vocabulary representing comprehension-knowledge. A significant correlation was also found between the WPPSI-R Performance IQ (PIQ) and the WJ-R (COG) Visual Processing cluster. Findings are discussed in terms of the theories of intelligence underlying each test. Implications for assessment of preschoolers under PL 99–457 also are discussed.     

Concurrent and predictive validity of the WISC-R,McCarthy Scales,Woodcock-Johnson,and academic achievement

Twenty-six normal first-grade children (M = 7.0 years) were administered the WISC-R, the McCarthy Scales, and the Woodcock-Johnson Scales of Cognitive Ability. Two years later, their levels of academic achievement were determined by way of the WRAT and global teacher ratings of classroom performance. Pearson intercorrelations among the summary indices of the three intellectual measures were significant and uniformly high (rang. 77-.95). Correlations between first-grade ability scores and third-grade achievement measures also were significant (range .64-.90), suggesting strong predictive validity for each of the cognitive instruments. Though not significantly so, the correlations between the Woodcock-Johnson and achievement tended to be the highest. The results indicate that all three intellectual measures are appropriate for predicting later academic achievement in young school-aged children.     

Concurrent validity of the Woodcock-Johnson tests of cognitive ability with the WISC-R: EMR children

The Wechsler Intelligence Scale for Children-Revised (WISC-R) and the Woodcock-Johnson Tests of Cognitive Ability (WJTCA) were administered in a counterbalanced order to 30 children referred for a three-year reevaluation. All children were currently placed in an educable mentally retarded (EMR) program. The children ranged in age from 8-0 to 12-5 years, with a mean of 10-6. The correlation coefficient between the WISC-R and WJTCA was observed to be .72. Significant mean differences were found between the WISC-R and WJTCA full scale standard scores. The implications of the findings are discussed relative to the placement of children in classes for the mentally retarded. Explanations for the mean differences between the WJTCA and WISC-R also are explored.     

An investigation of the K-ABC,WISC-R,and W-JPB,part two,with learning disabled children

The purpose of this study was to examine the relationship of the Kaufman Assessment Battery for Children (K-ABC), the WISC-R, and the Woodcock-Johnson Psychoeducational Battery (W-JPB), Part Two, with children who experience learning disabilities. Correlational analyses were used to examine relationships among the WISC-R, K-ABC Mental Processing and Achievement scales, and the W-JPB Achievement scales. Thirty-four children with learning disabilities (mean age 8–11 years) received all three measures. Correlation coefficients indicated stronger and more consistent relationships between the WISC-R and W-JPB Achievement tests than between the K-ABC and W-JPB Achievement tests. Significant relationships between the WISC-R Full Scale IQ and the K-ABC Mental Processing Composite (MPC) revealed evidence of validity for this learning disabled sample. However, correlation coefficients among the K-ABC Achievement subtests and the W-JPB Achievement clusters indicated both convergent and discriminant validity. Thus, it is suggested that both the K-ABC MPC, for assessment of cognitive abilities, and the W-JPB Achievement clusters could be employed in discrepancy formulas for special education placement of children with learning disabilities.     

How money matters for young children's development: parental investment and family processes

This study used data from the Panel Study of Income Dynamics and its 1997 Child Development Supplement to examine how family income matters for young children's development. The sample included 753 children who were between ages 3 and 5 years in 1997. Two sets of mediating factors were examined that reflect two dominating views in the literature: (1) the investment perspective, and (2) the family process perspective. The study examined how two measures of income (stability and level) were associated with preschool children's developmental outcomes (Woodcock-Johnson [W-J] Achievement Test scores and the Behavior Problem Index [BPI]) through investment and family process pathways. Results supported the hypothesis that distinct mediating mechanisms operate on the association between income and different child outcomes. Much of the association between income and children's W-J scores was mediated by the family's ability to invest in providing a stimulating learning environment. In contrast, family income was associated with children's BPI scores primarily through maternal emotional distress and parenting practices. Level of income was associated with W-J letter-word scores and income stability was associated with W-J applied problem scores and BPI, even after all controls were included in the models.     

Factor analysis of the Woodcock-Johnson with conduct disordered adolescents

A factor analysis of the 12 subtests of the Woodcock-Johnson Tests of Cognitive Ability was performed, using 286 conduct disordered male adolescents as subjects. A principal factor analysis procedure was utilized. Factors to be retained were confirmed using the scree test. The factor analysis procedure yielded three factors. These were interpreted as being a primary verbal ability factor, a secondary reasoning factor, and a secondary numerical processing factor. The perceptual speed and memory groupings identified by Woodcock were not duplicated. Implications of these results suggest the cautious use of the Cognitive Factor cluster scores for diagnosis of strengths and weaknesses for the behavior disordered population.     

Validity of WISC-R IQS and factor scores in predicting achievement for Mexican-American children

The predictive validity of the WISC-R IQs and factor scores was examined with a sample of 64 Mexican-American children. All the correlations among the WISC-R factor scores and academic achievement as measured by the Wide Range Achievement Test (WRAT) were found to be low, ranging from .09 to .31. Significant relationships were observed only between WRAT Reading and Perceptual Organization (PO) factor, WRAT Arithmetic and PO factor, and Freedom from Distractibility (FD) factor and WRAT Arithmetic scores. In contrast to this, however, significant relationships were observed between IQ scores and achievement measures, suggesting predictive utility of the WISC-R IQs in predicting achievement for Mexican-American children.     

Comparison of scores for intellectually gifted students on the WISC-R and the fourth edition of the Stanford-Binet

The WISC-R and the Fourth Edition of the Stanford-Binet (SB: FE) were compared in the identification and assessment of 48 intellectually gifted students in the primary and secondary grades. While only a 3.2-point difference between the mean SB: FE Composite score and the mean WISC-R Full Scale score was found, (r = .393, p. ⩽ .01), the t test between the two scores was significant (t = 2.30, p ⩽ .05). Correlations between the three scales of the WISC-R and the SB: FE four broad area and Composite scores ranged from −.219 (SB: FE Abstract/Visual Reasoning with WISC-R Verbal) to .599 (SB: FE Short-Term Memory with WISC-R Full Scale). Within the correlational matrix, only 5 of the 15 correlations were significant. Both the SB: FE Abstract/Visual Reasoning and Quantitative Reasoning Area scores had no significant correlations with any of the WISC-R scores.     

The concurrent validity of the Cognitive Levels Test with the Wechsler Intelligence Scale for Children-Revised for a sample of referred children and youth

The present investigation compared the Cognitive Levels Test (CLT) and the Wechsler Intelligence Scale for Children-Revised (WISC-R) scores for 55 children who were referred for remedial educational services. A comparison of the correlations for each of the criterion measures from the WISC-R showed a consistent significant positive relationship with the CLT. A repeated measures analysis of variance that compared standard scores for the CLT with those of the WISC-R indicated that significant differences existed between WISC-R IQs and the CLT Cognitive Index. Implications concerning the validity of the Cognitive Levels Test are discussed.     

Normative achievement assessment of gifted children: Comparing the K-ABC,WRAT, and CAT

The Kaufman Assessment Battery for Children (K-ABC) purports to assess fluid and crystallized intelligence via processing and achievement subtests, respectively. Eight K-ABC Mental Processing and five K-ABC Achievement subtests were administered to 41 gifted students. Scores were subsequently compared to concurrent achievement measures from the California Achievement Test (CAT), as well as previously obtained mental ability measures (Wechsler Intelligence Scale for Children-Revised [WISC-R], Stanford-Binet [SB], and Wide Range Achievement Test [WRAT] achievement scores). In general, K-ABC mental ability scores were lower than WISC-R and SB IQs. K-ABC achievement scores were consistent with K-ABC mental ability scores, but more highly related to SB and WISC-R VIQ (r = .42 and .40, respectively) than to WISC-R FSIQ (r = .16) and PIQ (r = .09), or to the K-ABC Mental Processing (Composite r = .17), Simultaneous Processing (r = .08), and Sequential Processing scores (r = .20). With the exception of WRAT Word Recognition, WRAT, K-ABC, and CAT achievement scores were similar. The patterns of intercorrelations suggest that the K-ABC achievement scores are more verbally loaded than are the CAT and WRAT achievement measures.     

A comparison of the WISC-R and the Woodcock-Johnson tests of cognitive ability

This study compares the performance of learning disabled students on the WISC-R and the Tests of Cognitive Abilities from the Woodcock-Johnson Psycho-Educational Battery. This study finds that learning disabled subjects performed more poorly on the Tests of Cognitive Abilities than on the WISC-R. Data relative to a number of possible explanations for these results are reported.     

The WISC-R and Woodcock-Johnson tests of cognitive ability: A comparative study

The Woodcock-Johnson Psycho-Educational Battery has become a popular instrument for assessing students with learning problems. Previous research has indicated a possible discrepancy between overall scores on the WISC-R and the congnitive portion of the Woodcock-Johnson with samples of learning disabled (LD) students. The current study, conducted with samples of students not designated as LD, also found significant differences in the mean scores between the two measures. The hypothesis that the difference between measures is a function of grade level was not supported. Other findings of the current study, coupled with previous research, suggest that the congnitive portion of the Woodcock-Johnson may be loaded with verbal factors.     

An examination of the CTONI utilizing Gc‐Gf theory: A comparison of the CTONI and WJ‐III

The present investigation examined the validity of the Comprehensive Test of Nonverbal Intelligence (CTONI) with the Woodcock‐Johnson III Tests of Cognitive Abilities (WJ‐III COG) by administering these instruments in counterbalanced order to 60 college students. Results indicated that the mean CTONI NIQ score was not significantly different from the mean WJ‐III COG General Intellectual Ability (GIA) score. However, mean score differences were found between the CTONI NIQ and the WJ‐III COG Verbal Ability, Thinking Ability, Comprehension‐Knowledge, and Fluid Reasoning cluster scores. Although the correlations between the CTONI and the WJ‐III COG cluster scores were generally of small magnitude, the CTONI Geometric Nonverbal IQ composite score demonstrated construct specificity, whereas the CTONI Pictorial Nonverbal IQ scale did not. The implications of the findings are discussed and practitioners are asked to use caution when using this instrument to assess the fluid reasoning abilities of college students. © 2007 Wiley Periodicals, Inc.     

Genetic and environmental influences on writing and their relations to language and reading

Identical and fraternal twins (N?=?540, age 8 to 18 years) were tested on three different measures of writing (Woodcock-Johnson III Tests of Achievement—Writing Samples and Writing Fluency; Handwriting Copy from the Group Diagnostic Reading and Aptitude Achievement Tests), three different language skills (phonological awareness, rapid naming, and vocabulary), and three different reading skills (word recognition, spelling, and reading comprehension). Substantial genetic influence was found on two of the writing measures, writing samples and handwriting copy, and all of the language and reading measures. Shared environment influences were generally not significant, except for Vocabulary. Non-shared environment estimates, including measurement error, were significant for all variables. Genetic influences among the writing measures were significantly correlated (highest between the speeded measures writing fluency and handwriting copy), but there were also significant independent genetic influences between copy and samples and between fluency and samples. Genetic influences on writing were significantly correlated with genetic influences on all of the language and reading skills, but significant independent genetic influences were also found for copy and samples, whose genetic correlations were significantly less than 1.0 with the reading and language skills. The genetic correlations varied significantly in strength depending on the overlap between the writing, language, and reading task demands. We discuss implications of our results for education, limitations of the study, and new directions for research on writing and its relations to language and reading.     

Relationship between WISC-R and WRAT in children referred for learning difficulties

Correlations between the WISC-R Full, Verbal, Performance, and Freedom from Distractibility Scale IQs, WISC-R subtest scaled scores, and Wide Range Achievement Test Reading, Spelling, and Arithmetic standard scores were computed for a sample of 114 children (64 boys, 50 girls), aged 6 to 16 years, who were referred for psychological evaluation because of academic or learning difficulties. The Full Scale IQ, Verbal Scale IQ, and Freedom from Distractibility IQ correlated moderately with the three achievement area standard scores (rs of .48 to .59). However, the Performance Scale IQ correlated minimally with reading and spelling scores (rs of .26 and .27), but moderately with arithmetic scores (r = .40). The results support the concurrent validity of the WISC-R.     

Diagnostic utility of the K-ABC and WISC-R/PIAT in determining severe discrepancy

The basic question addressed in this study was whether the discrepancies found between the Mental Processing Composite (ability component) and the Achievement subtests of the Kaufman Assessment Battery for Children (K-ABC) corresponded with the discrepancies found between the WISC-R Full Scale IQ and the PIAT subtests, or whether use of the K-ABC over the WISC-R and PIAT results in the identification of different students. The differences were evaluated using four standard score procedures for calculating a severe discrepancy. It was found that the K-ABC and WISC-R/PIAT approaches to the determination of a score difference resulted in the identification of different populations of students. The high average PIAT standard scores together with the lower subtest reliabilities appeared to be the primary source of disparity between the K-ABC and WISC-R/PIAT comparisons.     

Early Malnutrition and Child Neurobehavioral Development: Insights from the Study of Children of Diabetic Mothers

In this study we sought to discern whether disturbances in mothers' metabolism during pregnancy may exert long-range effects on the neurobehavioral development of the progeny. Participants were 139 Women with diabetes in pregnancy and their singleton offspring. Serial estimates of circulating maternal fuels were obtained for each pregnancy, along with detailed records of perinatal course and outcome. Offspring were administered the Wechsler Intelligence Scale for children—Revised (WISC-R) full-scale IQ scores below 70 in our cohort did not differ significantly from national estimates. Nonetheless, after statistically controlling for other influences, WISC-R verbal, performance, and full-scale IQ scores, and Bannatyne's indices of Verbal Conceptualization Ability, Acquired Knowledge, Spatial Ability, and Sequencing Ability were inversely correlated with measures, of maternal lipid and glucose metabolism in the second and third trimesters. KTEA Arithmetic scores were similarly correlated with measures of maternal lipids in the third trimester. All correlations indicate that poorer metabolic regulation was attended by poorer child performance. The effects of maternal metabolism on fetal brain and neurobehavioral development are discussed as potential intermediary factors.     

Correlations between the stanford-binet: Fourth edition and the WISC-R with a learning disabled population

The Fourth Edition of the Stanford-Binet and the WISC-R were compared as instruments for assessing the intellectual strengths and weaknesses of students classified as learning disabled in the primary and secondary grades. Results found only a 3.28-point difference (p≥.0001) between the S-B Composite score and the WISC-R Full Scale score. Correlations between the four broad areas of the S-B and the three scales of the WISC-R ranged from .494 (S-B Abstract/Visual Reasoning with WISC-R Verbal) to .920 (S-B Composite with WISC-R Full Scale). All correlations were found to be significant. Implications of the research findings were discussed.