A personal interview with a sales rep is a reliable predictor of success in the sales job because: A personal interview with a sales rep is a reliable predictor of success in the sales job because: Interviews are the most widely used selection tool. The sales job requires skills similar to those which are on display in the interview. The sales manager is known to be a highly effective interviewer and can consistently react so as to affect applicants' responses. It enables the interviewer to get a "gut" reaction instead of a merely objective evaluation