Alternate form reliability and concurrent validity of the PPVT-R for referred rehabilitation agency adults.
This study investigated the relationships among the Peabody Picture Vocabulary Test-Revised (PPVT-R) alternate forms and, also, the relationship of each PPVT-R form with the Wechsler Adult Intelligence Scale-Revised (WAIS-R) for a referred sample of 60 adult clients of the California State Department of Rehabilitation. Clients ranged in age from 18-3 to 37-7 (M = 25-7, SD = 5-9). PPVT-R alternate forms r = .88 was significant at p less than .001. Correlations with the WAIS-R VIQ were .82 for L, .78 for M; with PIQ, .46 for L, .38 for M; with FSIQ, .77 for L, .67 for M. All correlations with both forms of the PPVT-R were significant. PPVT-R mean scores did underestimate significantly all WAIS-R mean scores. Implications are discussed.
D000328:Adult; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis* / Q000523:psychology; D007361:Intelligence Tests; D007859:Learning Disabilities / Q000175:diagnosis* / Q000523:psychology; D008297:Male; D019965:Neurocognitive Disorders / Q000175:diagnosis; D011594:Psychometrics; D014825:Vocabulary