Evaluation apprehension refers to the experience of being anxious about being negatively evaluated or not positively evaluated . In other other words it is the concern for how others are evaluating us.
Other /More definition:
Evaluation apprehension refer to concerns about being evaluated or judged by other people; sometimes assumed to produce increased arousal. It is the concern for how others are evaluating us.
Evaluation apprehension refers likewise to the participants' concern about being evaluated or judged during an experiment. It is the idea that a person performing a task becomes aroused because he or she is concerned that others are evaluating his or her performance.