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)

The Work Performance Assessment (WPA) is a brief work simulation designed to evaluate job maintenance skills, emphasizing work-related social/interpersonal skills rather than specific vocational skills. The WPA uses three work samples involving sorting of food service items to measure 19 common work demands in four categories: responding to…

A study was conducted (1) to obtain an estimate of the amount of error in prediction that occurs when static measures are used to interpret work-sample performance; (2) to identify a number of dynamic performance measures that reflect learning that might occur on the task; and (3) to compare the predictive accuracy of those measures to that of…

The Micro-TOWER System of Vocational Evaluation was developed in response to the need for a revision of the TOWER (Testing, Orientation, and Work Evaluation in Rehabilitation) System. The Micro-TOWER system of work sample tests measures the major aptitudes required for most semi-skilled and unskilled occupations. It may be used as a screening…