4.Know the performance measures criteria (reliability, validity, and specificity) a.Validity:-Content validity:The extent to which a performance measure assesses all relevant aspects of performance-Must not be deficient or contaminated: Deficient: it does not measure all aspects of performance Contaminated: it evaluates irrelevant aspects of performance or aspects that are not job-related-Concerned with maximizing the overlap between actual job performance and measure ofjob performanceb.Reliability:-Reliability:Consistency of a performance measurement-Interrater reliability: Consistency among individuals who evaluate employee's performance-Test-retest reliability: Should be reliable over timec.Specificity:-Specificity:Extent to which a performance measure tells employees what is expected and how to meet those expectations-Relevant to both strategic and developmental purposes-Must measure what an employee must do to achieve the company's goals-Must point out employee's performance problems