Currently, the Developmental Record is widely used with developmentally disabled adults, at least in the midwestern and southwestern region of the United States. Since it inception in 1974, there have been no subsequent reliability and validity studies confirming its clinical usefulness. For the present study a total of 1,069 Developmental Record protocols were obtained from archival files of a large midwestern facility for mentally retarded persons. Analyses revealed high internal reliabilities, but questionable validity. Specifically, the subscale structure of the instrument was not confirmed by the factor analysis.