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What does PPVT-A stand for?

PPVT-A stands for instruments--Peabody Picture Vocabulary Test-Form A

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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,