A researcher is interested in studying the effects of a music therapy program on depression in nursing home residents. The IV is the music therapy program (2 sessions per week for 6 weeks) and the DV is scores on three different measures of depression. If you were conducting this research, which of the following designs would you choose? Explain.

• oone-group post-test only design
• oone-group pretest-posttest design
• onon-equivalent control group design
• onon-equivalent pretest-posttest design
• ointerrupted time series design
• ocontrol series design