The PPVT-R: Validity as a quick screen of intelligence in a postacute rehabilitation setting for brain-injured adults
✍ Scribed by Fred Ingram; Jerome Caroselli; Heather Robinson; Roderick D. Hetzel; Karen Reed; Brent E. Masel
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 80 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0021-9762
No coin nor oath required. For personal study only.
✦ Synopsis
The utility of the Peabody Picture Vocabulary Test-Revised (PPVT-R) as a surrogate for the Wechsler Adult Intelligence Test-Revised (WAIS-R) was investigated in 61 brain-injured adult participants in a postacute rehabilitation setting. Idiographic comparison revealed substantial disagreement in clinical classification between the two instruments, and it is concluded that the PPVT-R is not a good surrogate for the WAIS-R for this purpose. In contrast, the PPVT-R was judged an adequate surrogate for the WAIS-R for the purpose of group comparison, as is common in biomedical research. Finally, contrary to prior report, the PPVT-R was demonstrated to measure more than simply Vocabulary. As such, in the absence of independent validation research, perhaps the most parsimonious conclusion regarding what the PPVT-R is measuring is that like each of the various subtests of the WAIS-R, the PPVT-R shares some of the variance of the construct termed intelligence, as well as demonstrates some unique variance that is likely comprised of error and, perhaps, a unique or different facet of intelligence.