Many of the Psychology databases are in EBSCOhost. Here is a sample search on music therapy and eating disorders:
If the full text is not available for the article you want to see, click on the button or the "Find Text" link to see if the full text is available in another database.
You can limit or change your search based on date, subject, type of article, etc.
International Index to Music Periodicals (IIMP) has full-text articles from the Journal of Music Therapy and other related titles. Here is a sample search on trauma and music therapy:
From the list of results you can view the full text of individual articles or set further parameters on the right side of the screen.