Purpose: Designed as a test of receptive vocabulary achievement and verbal ability.
Population: (English speaking) individuals ages 2:6 through 90+ years
Score: Standard scores range from 40 to 160.
Time: (11-12) minutes for most people.
Author: Lloyd M. Dunn and Leota M. Dunn
Publisher: American Guidance Service
Description: The Peabody Picture Vocabulary Test - Third Edition (PPVT-III) updates the PPVT of 1959 and the PPVT-R of 1981, and like them is an individually administered, un-timed, norm-referenced, wide-range test with two parallel forms. The 204 items on each form are grouped into 17 sets of 12 items of 4 black and white illustrations forming a picture plate. The original PPVT used 300 stimulus words, 150 on each form of the test. In the development of the PPVT-III item pool, national tryouts were used to eliminate stimulus words that were biased by gender, region, race or ethnicity. The test has two parallel forms, requires no oral or written responses and no reading by the examinee.
Scoring: Rapid and objective scoring is done while the test in being administered. Raw scores are converted into normative scores.
Reliability: The alpha reliabilities for the 25 standardized age groups were between .92 and .98 with a median reliability of .95 for both forms. The split-half reliabilities for the 25 age groups ranged from .86 to .97, with a median of .94 for both forms. The altenate forms reliabilities range from .88 to .96 with a median correlation of .94.
Validity: Correlations of the PPVT-III form A and B scores with scores of the WISC-III VIQ are .91 and .92; with the KAIT Crystallized IQ, .87 and .91; and with the K-BIT Vocabulary score, .82 and .80. Slightly lower correlations with the non-verbal scores were predicted; with the WISC-III PIQ .82 and .84; KAIT Fluid IQ, .76 and.85, and with the K-BIT matrices score, .65 and .62. Full scale IQ on the WISC-III was .90 and .90, KAIT Composite IQ was .85 and .91, K-BIT composite, .78 and .76.
Norms: The normative sample included 2725 persons. And while the original PPVT was standardized only on white children from Tennessee, the normative sample of the PPVT-III was selected to match the data of the 1994 US Census. The sample was stratified with each age group by gender, race/ethnicity, geographic region, and SES. Only individuals who were determined to speak and understand English were included in the testing
Suggested use: The PPVT-III is useful in testing preschool children for vocabulary acquisition as an indicator of linguistic and cognitive development. When English is the language of home, school, and community, it can be used as a screening device for verbal ability and for giftedness and for mental retardation. It is a useful test for people who perform poorly on group tests, or for nonreaders and for those with written language problems. For individuals with language impairment, it can provide a measure of linguistic potential, and it is useful for those who are autistic, withdrawn, or have psychotic problems, as speech is not required. Individuals with cerebral palsy or with visual-perceptual problems can also take this test.