Peabody Picture Vocabulary Test
The Peabody Picture Vocabulary Test is an international standard procedure for recording receptive vocabulary and serves as an indicator of academic performance and crystalline intelligence . The fourth edition of the original version (PPVT-IV) was published in 2007 for the English language. The test has no time limit, comprises 228 tasks and has age-specific entry and exit criteria. A German-language adaptation is expected to appear at the end of 2014. The process itself has a long tradition. The first version was published by Lloyd M. Dunn and Leota M. Dunn in 1959.
procedure
The tasks consist of picture cards on which four pictures can be seen. The test leader asks the test person to show a term by choosing the correct picture. The tasks form task blocks of 12 tasks each and the blocks are ranked in increasing difficulty. Depending on the age of the test person, an introductory block is chosen and whole blocks are always presented. If the number of solved tasks falls below the minimum of 5 correct tasks per block, the performance is ended. The test itself only takes about 15 minutes. The raw score achieved can be converted into T scores or percentile ranks . For the execution and evaluation of the test, previous experience in the application and evaluation of psychological test procedures is necessary.
application
The PPVT-IV is used as an indicator of verbal intelligence and has been applied to a large number of different groups, including people with written language problems, learning or intellectual disabilities, speech development disorders or delays, hearing impairments and deafness, giftedness, dementia syndromes and in rehabilitation.
German-language adaptation
The German-language adaptation was based as closely as possible on the English original version. The image material was completely preserved and an attempt was made to translate the original tasks into German while maintaining the difficulty. Where no parallel terms were available, either the part of speech was changed or one of the distractors was used.
Test quality
The standard values of the German-language version are based on the data from 4880 children and adolescents between the ages of 2 years and 6 months and 17 years and 6 months. The method has a very high level of reliability with reliability parameters of around 0.97.