Influence of Dosage and Type of Music Therapy in Symptom Management and Rehabilitation for Individuals with Schizophrenia.

The purpose of this systematic review was to investigate the influence of dosage, type (active, receptive, or combined), and format (individual or group) of music therapy for individuals with schizophrenia. With the terms "music*" and "schizophreni*," six research databases were searched: CINAHL, EMBASE, Music Index, PsycInfo, Pubmed, and RILM. The search was limited to studies written in English, peer-reviewed, and published between 1991 and 2015. Seventeen articles met the stated criteria. Dosage of music therapy ranged from 20 to 9,720 minutes. Three types of music therapy were delivered: active, receptive, or combined, and therapy was implemented via individual or group format. Depending on the dosage, type, and format, music therapy improved psychotic symptom management, depression and anxiety management, social and cognitive functioning, behavior, and quality of life of the participants. Dosage had a greater impact on the effects of music therapy compared to type and format. Studies that implemented a combination of active and receptive music therapy were more likely to produce significant improvements in outcomes compared to the studies that implemented the other types of music therapy. However, studies using combined type provided higher dosage of the intervention (e.g., more minutes of intervention exposure). This systematic review can be used to guide future research on and clinical applications for music therapy in this population. Future studies might also investigate the interaction of demographic characteristics or severity of illness with dosage and type on effects of music therapy.