The author suggests that much of the current vocational evaluation technology does not fit within the definition of a work sample, and warns that if evaluators do not integrate their measurement tools with the discipline's philosophy, system publishers will gain control over vocational evaluation. (CL)

The author deals with limitations on the use of work samples as predictors of vocational success of the disabled. The predictive model is briefly reviewed and ways in which the assumptions underlying this model can be violated or altered in vocational evaluation settings are described. (Author)

Included in the review are work samples; the Jewish Employment and Vocational Service Evaluation System; the Singer Evaluation System; the Testing, Orientation, and Work Evaluation in Rehabilitation System; and the Systematic Approach to Vocational Evaluation System. (Author)