F scores were from analysis of covariates with pretest scores as covariates.
attention, calculation, language, and construction. The group music therapy used in this study was an effective intervention for improving emotional relaxation and cognitive processing abilities in patients with chronic schizophrenia. We applied group music therapy as a nursing intervention to patients with schizophrenia, utilizing brain wave as measured by EEG as an objective measure to explore the intervention effect. Our results can be useful for establishing intervention strategies toward psychiatric rehabilitation for those who suffer from chronic mental illnesses. The effects of music therapy were investigated using psychological and physiological measurement tools, providing the basis of the scientific clinical application of music therapy. Further research is necessary to compare the effectiveness of the program according to the type of mental illness and confirm the effectiveness of the program in a community setting.