Until recently, older workers have not been recognized as a group requiring special attention in the area of fair employment practices. Thus, progress has been slow towards the development of valid and reliable indices of performance which are applicable across the life span. Research shows that many measures of employee evaluation provide no norms for older groups; however, there is some evidence to justify a concern for age discrimination in testing. Test constructors should minimize extraneous factors (environmental effects, speed, anxiety) typically shown to bias the assessment of older workers. For example, in a recent study of computer operators aged 18 to 59, tests from a specially developed test battery were significantly related to performance, while a more widely used test battery had significant correlations with age. Further research on the evaluation of older workers is needed. (JAC)