The PPVT-R: validity as a quick screen of intelligence in a postacute rehabilitation setting for brain-injured adults.
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.
Ingram
F
F
The University of Texas Medical Branch at Galveston, Transitional Learning Community at Galveston, USA. FRED.INGRAM@VANDERBILT.EDU
Caroselli
J
J
Robinson
H
H
Hetzel
R D
RD
Reed
K
K
Masel
B E
BE
D000208:Acute Disease; D000328:Adult; D001930:Brain Injuries / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D008297:Male; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012720:Severity of Illness Index