Gámez, W., Chmielewski, M., Kotov, R., Ruggero, C., Suzuki, N., & Watson, D. (2014). The Brief Experiential Avoidance Questionnaire: Development and initial validation. Psychological Assessment, 26(1), 35–45. https://doi.org/10.1037/a0034473
Vázquez-Morejón, R. et al. (2019). Validation of a Spanish version of the Brief Experiential Avoidance Questionnaire (BEAQ) in clinical population. Psicothema, 31(3), 335-340. DOI: 10.7334/psicothema2019.60 You can find the BEAQ in the appendix.
Ong, C.W., Pierce, B.G., Petersen, J.M., Barney, J.L., Fruge, J.E., Levin, M.E., & Twohig, M.P. (2020). A psychometric comparison of psychological inflexibility measures: Discriminant validity and item performance. Journal of Contextual Behavioral Science, 18, 34-47. https://doi.org/10.1016/j.jcbs.2020.08.007
Aller, T.B., Barrett, T., Levin, M.E., McClain, M.B. (2022). Measuring psychological flexibility in autistic adults: Examining the validity and reliability of the AAQ-II, BEAQ, and VQ. Journal of Contextual Behavioral Science, 26, 125-133. DOI: 10.1016/j.jcbs.2022.09.001