Correlations and factor analysis of the WISC-R and the Peabody Picture Vocabulary Test for an adolescent psychiatric sample.

Abstract

Wechsler Intelligence Scale for Children-Revised (WISC-R) and Peabody Picture Vocabulary Test (PPVT) scores of adolescent psychiatric patients were correlated and factor analyzed. The purposes were to explore the factor structure of these scores among a psychiatric sample for comparison with other samples in the literature and to determine whether the PPVT adds sufficient information to an intellectual assessment battery. Three factors emerged that were similar to previously reported factors using other subject samples. The PPVT loaded heavily on the factors emerging from the WISC-R, suggesting that the PPVT adds little to information gained from the WISC-R.

Comparison of various WISC-R summary scores for a psychiatric sample

“…He labelled the three factors: (a) Verbal Comprehension (VC), which consists of Information, Similarities, Vocabulary, and Comprehension; (b) Perceptual Organization (PO), which consists of Picture Completion, Picture Arrangement, Block Design, and Object Assembly; and (c) Freedom from Distractability (FD), which consists of Arithmetic, Digit Span, and Coding. These findings have been replicated with other samples, including adolescent psychiatric patients (DeHorn & Klinge, 1978), mentally retarded children (Van Hagan & Kaufman, 1975) and children with various neuropsychological diagnoses (McMahon & Kunce, 1981). Also, a factor-analytic study conducted with the behaviorally disordered children used in the present study yielded three factors remarkably consistent with those found in Kaufman's normal sample (Hodges, in press…”

Beyond Social Skills: Supporting Peer Relationships and Friendships for School-Aged Children with Autism Spectrum Disorder

“…We counted studies as having a measure of cognitive functioning if they included measures of IQ (e.g., Wechsler Intelligence Scale for Children) or measures highly correlated with IQ (e.g., receptive vocabulary measures). 52,53 Our characterization is adapted from one review's system of describing lower functioning as IQ scores < 55, medium functioning as scores of 55 to 85, and higher functioning as scores > 85. 34 We used standardized scores from the measures previously mentioned to categorize the functioning level of research participants in each study (see Table 1).…”

The Mediating Effects of Verbal Skills in the Relationship Between Low Birth Weight and Childhood Aggressive Behaviour

“…The PPVT 'measures an individual's receptive (hearing) vocabulary for Standard American English and provides, at the same time, a quick estimate of verbal ability or scholastic aptitude' (Dunn & Dunn, 1981). The PPVT-R has been used to approximate verbal intelligence in a variety of studies (Ayduk, Rodriguez, Mischel, Shoda, & Wright, 2007;Oddy et al, 2003), and it has been shown to significantly correlate with Wechsler Intelligence Scale for Children-Revised verbal IQ scores (DeHorn & Klinge, 1978). The PPVT-R raw score was a slightly skewed continuous variable (skew = .501) that ranges from scores of 0 to 85, with a mean of 26.44 and a standard deviation of 14.88.…”