The factor analysis suggests that one overall opinion of the evaluated resident was informing the responses of the evaluator. Shortening the instrument to the three items responsible for the greatest influence on the survey does not result in a large decrease in reliability as measured by Cronbach alpha. It is possible that time limitations prevent residents from putting thought into the evaluation of their peers, which results in unidimensional responses. Shortening the instrument may improve evaluations and should be studied in the future.