Which of the following is a measure to ensure reliability in performance evaluations?

• A. Adoption of clear policies
• B. Selection of a valid performance appraisal instrument
• C. Training for supervisors in gathering objective data
• D. Active participation by those being evaluated

Answer: (C)

Reliability in performance evaluations hinges on consistency—ratings should be stable across time, raters, and situations. Training supervisors to gather objective data directly targets that consistency. When supervisors learn exactly what evidence to look for, how to observe behaviors, and how to use rating scales with clear anchors, they apply the same criteria to similar performances. This reduces personal interpretation, bias, and drift in how ratings are assigned, making results more repeatable and dependable regardless of who does the assessment or when it’s conducted. For example, training might cover documenting specific achievements, using numerical scales consistently, and avoiding vague judgments, so two supervisors evaluating the same employee would converge on similar scores.

Other options contribute to the evaluation system in meaningful ways, but not as directly to reliability. Clear policies promote uniform procedures and expectations, which helps consistency but doesn’t guarantee how data are collected or interpreted. Using a valid appraisal instrument ensures the tool measures what it’s supposed to measure, which improves overall measurement quality, but reliability hinges on how the instrument is used. Having those being evaluated participate can improve buy-in and fairness, yet it doesn’t by itself ensure the ratings are consistently applied.