This second edition of an already popular assessment instrument is the result of nearly continuous field testing since 1978 and has been submitted to rigorous standardization procedures. Approximately 5,000 subjects participated in the sampling. This total population includes regular and special student groups and adults in many walks of life, in diverse demographic areas throughout the United States and Canada. Reliability and validity were thoroughly established. Results from 60 research studies are presented in over 100 tables in the Examiner s Manual.
Conversion tables give t scores and percentiles for total and all subtest scores.
Included are flexible forms of administration and quick-scoring acetates. Forms A, B, and AD are available in English and Spanish. The cassette tape for all three forms is also available in both languages.