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ERIC Number: ED023654
Record Type: Non-Journal
Publication Date: 1968-Mar
Reference Count: N/A
Reliability of a Group Form of the Peabody Picture Vocabulary Test.
Tillinghast, B. S., Jr.; Renzulli, Joseph S.
Journal of Educational Research, v61 n7 p311-14 Mar 1968
The purpose of this study was to further examine the reliability of the Peabody Picture Vocabulary Test (PPVT), a new instrument to measure hearing vocabulary so that a student's verbal intelligence may be inferred. A group testing procedure was utilized by reproducing the PPVT plates on 35 millimeter transparent slides and projecting them onto a 60 by 60 inch screen. A sample of 414 fourth-, fifth-, and sixth-grade pupils was tested twice with Form A and Form B, requiring one-half hour to administer separately and 1 hour when combined into one longer test. Alternate form reliability compared favorably with the PPVT manual, but an unforeseen difficulty in administering the test under group conditions was that ceiling scores had to be established individually for 161 pupils and basal scores for 15. Test-retest reliability coefficients ranged from .73 to .85. Combining the two forms into one test yielded test-retest reliability coefficients of .90, .88, and .84 for the fourth, fifth, and sixth grades respectively. Since reliability increased with the use of the combined test forms, psychometrists should give serious consideration to using both forms of the test as one longer instrument. Validity studies comparing group forms with individual forms are needed. (Author/LH)
Descriptors: Aptitude Tests, Elementary School Students, Evaluation, Group Testing, Reliability, Test Reliability, Testing, Testing Problems, Tests, Verbal Ability, Verbal Tests, Vocabulary
Dembar Educational Research Services, Box 1605, Madison, Wisconsin 53701 (Single copy $1.00).
Publication Type: N/A
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Peabody Picture Vocabulary Test