Master's Degree. Your master's degree is where you will get the specialized training you need to become a licensed therapist. You will likely take classes in interpersonal, group, family, and child psychology, as well as classes on ethics in therapy, psychological theories, research methods, and clinical best practices. doctoral degree is the highest educational level a therapist can achieve. While it is not required to practice as a therapist, you will have to get a doctorate if you want to become a licensed psychologist.