Someone really wanted that song but it was not me!: Evaluating Which Information to Disclose in Explanations for Group Recommendations

Explanations can be used to supply transparency in recommender systems (RSs). However, when presenting a shared explanation to a group, we need to balance users' need for privacy with their need for transparency. This is particularly challenging when group members have highly diverging tastes and individuals are confronted with items they do not like, for the benefit of the group. This paper investigates which information people would like to disclose in explanations for group recommendations in the music domain.