Robustness Against Polarity Bias in Decoupled Group Recommendations Evaluation

Group recommendations are a specific case of recommender systems (RS), where instead of recommending for each individual independently, shared recommendations are produced for groups of users. Usually, group recommendation techniques (i.e., group aggregators) are built on top of common ”single-user” RS and the resulting group recommendation should reflect both the overall utility of the recommendation as well as fairness among the utilities of individual group members.