Final answer:
It is true that professional training in music therapy began in the 1960s in the USA, influenced by social changes and the need for new mental health practices.
Step-by-step explanation:
Regarding the assertion that professional training in music therapy began in the 1960s in the USA, this statement is true. The field of music therapy saw significant development during this time, with the establishment of educational programs and professional standards. A wave of social change in the 1960s, influenced by both post-World War II optimism and movements for reform in the mental health systems, provided a fertile ground for the rise of music therapy as a professional practice. The use of music for therapeutic purposes, which can include the promotion of mental health and wellness, has roots that stretch back considerably further, but the formalization of training and the pursuit of music as a therapy form truly took off during this era in the United States.