Begin by extending an invitation for them to express their worries in a discreet, accepting environment. Actively listen to them while validating their viewpoint and respecting their feelings. Give a clear explanation of the rating criteria and include specific instances to back up your comments. Address any misconceptions or perceived prejudices, if any. Talk about strategies to help them grow and develop, including concrete measures to satisfy expectations, and keep your attention on the solutions. Stress that assessments serve as instruments for development rather than as a form of discipline. To restore trust, check the evaluation procedure for consistency and fairness if needed.

Firstly allow them them to ventilate their frustration. And show them their views are noted - it is on record. That showS them their response is important. Then ask them if they think there is a way of making future evaluations more accurate/representative. Note that formally as well. Then re-emphasize the evaluation is just one event and they should understand that it will only carry weight until the next evaluation. Then invite them to take a step back and discuss this evaluation in the context of previous evaluations, and what that person thinks will be the outcome of the next one.