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Stability, concurrent and predictive validity of the PPVT‐R
Author(s) -
Naglieri Jack A.,
Pfeiffer Steven I.
Publication year - 1983
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/1097-4679(198311)39:6<965::aid-jclp2270390624>3.0.co;2-9
Subject(s) - psychology , peabody picture vocabulary test , concurrent validity , predictive validity , test validity , standard score , raw score , test (biology) , developmental psychology , psychometrics , clinical psychology , statistics , psychiatry , internal consistency , cognition , paleontology , mathematics , biology , raw data
Explored the relationship between the Peabody Picture Vocabulary Test‐Revised (PPVT‐R) and the Peabody Individual Achievement Test (PIAT), and pretest PPVT‐R standard scores administered about 7 months earlier for a sample of 29 mentally retarded children between the ages of 5‐5 and 12‐7 (X = 9‐6, SD = 1–11). Pretest PPVT‐R scores correlated moderately with PIAT standard scores (Median r = 0.43) and with posttest PPVT‐R scores ( r = 0.81). There was no significant difference between the mean pre and post PPVT‐R scores (60.3 and 58.5, respectively). The PPVT‐R and PIAT Total Test Score administered in the same session correlated 0.71 (Median r with the PIAT's subtests = 0.64). Implications are discussed in light of the stability and predictive and concurrent validity of the PPVT‐R for this sample.