Krafft, J., Ong, C.W., Twohig, M.P., Levin, M.E. (2019) Assessing psychological inflexibility in hoarding: The Acceptance and Action Questionnaire for Hoarding (AAQH). Journal of Contextual Behavioral Science, 12, 234-242. https://doi.org/10.1016/j.jcbs.2018.08.003 The AAQH is in the Appendix. The AAQH can be downloaded from the Utah State University ACT Research Group.
Ong, C.W., Krafft, J., Levin, M.E., & Michael P. Twohig, M.P. (2021). A systematic review and psychometric evaluation of self-report measures for hoarding disorder. Journal of Affective Disorders, 290, 136-148. https://doi.org/10.1016/j.jad.2021.04.082