For anyone interested in using the Musician’s Acceptance & Action Questionnaire (MAAQ) within their ACT work, you may use it freely. Please cite it whenever you are using it within your research.
It measures psychological flexibility within music performance & practice, and it can be applied with student & professional musicians.
The citation is: Juncos, D.G., Taylor, J.B., Zenobi, D., & Osborne, M. S. (2023). Assessing Psychological Flexibility in Student and Professional Musicians: Initial Psychometric Properties of the Musician’s Acceptance and Action Questionnaire. Manuscript under review.