Knowledge-of-Predictor Knowledge-of-predictor bias occurs when the interviewer isaware that a candidate scored particularly high (or low) on an assessment test that has been shown to be a valid predictor of performance.Leniency Leniency bias occurs when an interviewer tends to go easy on a candidate andgive a higher rating than is warranted, justifying it with an rationalization.Negative Emphasis The negative emphasis bias occurs when the interviewer allows asmall amount of negative information to outweigh positive information.