Purpose: Designed primarily to measure a subjectís receptive (hearing) vocabulary for Standard American English.
Population: Ages 2.5 to 40.
Score: 1 score.
Time: (10-20) minutes.
Authors: Lloyd M. Dunn, Leota M. Dunn, Gary J. Robertson, and Jay L. Eisenberg.
Publisher: American Guidance Service.
Description: The Peabody Picture Vocabulary Test - Revised (PPVT-R) was designed as a measure of receptive language and has replaced the original Peabody Picture Vocabulary Test (PPVT) published in 1959. The PPVT-R retains many features of its predecessor. For example, it consists of two forms (L and M), allows a verbal or nonverbal response, is individually administered, and is untimed (although administration time typically requires only 15-20 minutes). The PPVT-R contains 350 items making it more reliable and discriminating than the PPVT, which had only 300 items.
Scoring: The score is obtained by subtracting errors from total ceiling score.
Reliability: The test manual reports internal consistencies from .61 to .88, and alternate form reliability values from .71 to .91 from the standardization sample. Also, when alternate-form equivalency is examined by comparing means, Form M typically produces slightly higher standard score equivalents than does Form L.
Validity: When PPVT-R standard scores are compared to PPVT IQS, WISC-R IQS, and Stanford-Binet IQS, the mean PPVT-R scores have been significantly lower. However, results from two studies indicate comparable mean standard scores between the PPVT-R and McCarthy Scales of Childrenís Abilities. Correlations ranging from .16 to .78 have been obtained from studies examining the relationship between the PPVT-R standard score equivalents and various "g factor" scores such as Wechsler Full Scale IQS, Stanford-Binet IQS, and McCarthy Scales of Childrenís Abilities GCIs; correlation coefficients ranging from .40 to .60, however, are more common. The modest coefficients of determination emerging from these correlations suggest limited shared variance; thus PPVT-R scores should not be interpreted as intelligence test scores. No predictive validity (or long-term temporal stability) data are available.
Norms: The PPVT-R was standardized in 1979 on a sample of 4,100 children and youth in the age range from 2 ½ to 19 years with 100 children of each sex at each age level. It was also standardized on a sample of 828 adults with approximately 200 adults for each of the age ranges from 19 to 24, 25 to 29, 30 to 34, and 35 through 40 years. The sample of children was selected to approximate the 1970 U.S. Census data for sex and age, geographic, occupational background, racial-ethnic, and urban-rural population distributions.
Suggested Uses: Recommended uses include research and educational