Answer: Contrast
Step-by-step explanation:
Contrast error is a type of rating error whereby how a target person is evaluated in a group is dependent and affected by how others perform in that group.
Contrast error is used in appraising the performance of an individual and the rating of a candidate will be affected by how the person before him or her was rated. Based on the question, Juan was rated below average because the person before him was given an exceptional rating.