The BIFIS is a measure of body image flexibility and inflexibility for youth.
References:
Brichacek, A.L., Neill, J.T., Murray, K., Rieger, E., & Watsford, C. (2023). Ways of Responding to Body Image Threats: Development of the Body Image Flexibility and Inflexibility Scale for Youth. Journal of Contextual Behavioral Science, 30, 31-40. https://doi.org/10.1016/j.jcbs.2023.08.007