Blind vocational rehabilitation clients (N=100) were administered the Displacing and Turning tests of the Minnesota Rate of Manipulation Tests after three practice trials. Subjects essentially scored lower than people with normal vision, with their means on both tests being at the first percentile of the norms for sighted persons. (Author/DB)

The primary purpose of this monograph is to describe how learning curves can be applied to vocational evaluation procedures to enhance the reliability and accuracy of performance prediction. Particular emphasis is placed on describing two techniques known as the "best 20 percent method" and the "Performance Analyzer and…