The Woodcock-Johnson IV Tests of Cognitive Abilities (WJ IV COG) is a comprehensive assessment battery designed to assess broad and narrow cognitive abilities, as defined by the Cattell-Horn-Carroll (CHC) theory of intelligence. Previous studies examined the invariance of the WJ assessments across sex and age groups using factor analytic methods.…

Previous confirmatory factor analytic research that has examined the factor structure of the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) has endorsed either higher order models or oblique factor models that tend to amalgamate both general factor and index factor sources of systematic variance. An alternative model that has not yet…

The challenge of correctly identifying gifted students is a critical issue. Gifted education in Puerto Rico is marked by insufficient support and a lack of appropriate identification methods. This study examined the reliability and validity of a Spanish translation of the "Gifted Rating Scales-School Form" (GRS) with a sample of 618…

The present study investigated the stability of scores on the WISC-IV and WAIS-IV over an approximate six-year period. Previous research using older versions of the WISC and WAIS have suggested that these scales demonstrate strong stability of scores. Since research that has compared the stability of scores between the WISC-IV and the WAIS-IV is…

New editions of the Wechsler Adult Intelligence and Memory scales are now available. Yet, given the significant changes in these new releases and the skepticism that has met them, independent evidence on their psychometric properties is much needed but currently lacking. We administered the WAIS-IV and the Older Adult version of the WMS-IV to 145…

Relative to other cognitive areas, there are few clinical measures currently available to assess social perception. A new standardized measure, the Wechsler Advanced Clinical Solutions (ACS) Social Perception subtest, addresses some limitations of existing measures; however, little is known about this new test. The first goal of this investigation…

Data on psychiatric problems in adults with autism are inconsistent, with estimated rates ranging from around 25% to over 75%. We assessed difficulties related to mental health in 58 adults with autism (10 females, 48 males; mean age 44?years) whom we have followed over four decades. All were of average non-verbal intelligence quotient when…

The test-retest IQs of 50 patients were correlated. The patients were included in the sample only because they had been given the Wechsler Adult Intelligence Scale before. The interval between test and retest averaged almost two years. All test-retest correlations were .90 or better. (Author)

A regression equation relating verbal and full-scale IQs was derived from scores of patients. Scores were highly correlated, and verbal IQ significantly exceeded full-scale IQ. Regression estimates closely estimated mean full-scale IQ, suggesting that the verbal scale serves effectively as a WAIS abbreviation. (Author)

Investigated the relaionships among the Peabody Picture Vocabulary Test Revised (PPVT-R) alternate forms and the relationship of each PPVT-R form with the Wechsler Adult Intelligence Scale-Revised (WAIS-R). All correlations with both forms of the PPVT-R were significant. PPVT-R mean scores did underestimate significantly all WAIS-R mean scores.…