There are many social aspects of music in everyday life. These include, for instance, the influence of peers on personal music preferences or the social interaction of audiences during music performances. Furthermore, numerous studies have shown that music is a powerful means to induce emotions. But past studies have primarily concentrated on the experience of individuals listening to music alone; the interpersonal influences on the induction of emotion through music have not been the focus of previous research. This thesis investigated the influence of a) others' opinions about the emotional effects of music pieces and b) listening to music together as a group. Accordingly, new and innovative methods were employed: By using Web experiments as well as multi-channel physiological and psychological measurements of multiple participants, Hauke Egermann investigated the extent to which musically induced emotions are subject to these social influences. The monograph concludes with a discussion on methodological and theoretical aspects of the topic investigated.