16. Maria's supervisor also notices that the performance evalulations include ratings on interpersonal interactions with customers; however, only half of the staff have face-to-face or telephone interactions with customers. What is the problem here? A. Criterion deficiency B. Criterion contamination C. Criterion validity D. Content validity E. Lack of validity 17. explains that employees evaluate the fairness of a pay structure by thinking about their pay relative to their inputs, such as training, experience and effort. A. Motivation theory B. Maslow's hierarchy of needs C. Justice theory D. Equity theory E. Job characteristics theory 18. Which of the following benefits is required by law in the United States? A. Paid time off B. Paid sick leave C. Life insurance D. Health insurance E. Social security