This Bull's Eye is an approach developed by Tobias Lundgren and JoAnne Dahl at the University of Uppsala and successful used in a recent study on reducing epileptic seizures with ACT.
The Bulls-Eye 2 is the revised version of the measure and is currently being validated.
References:
Lundgren, T., Luoma, J.B., Dahl, J., Strosahl, K., &Melin, L. (2012). The Bull's-Eye Values Survey: A Psychometric Evaluation. Cognitive and Behavioral Practice, 19(4), 518-526. https://doi.org/10.1016/j.cbpra.2012.01.004
Barrett, K., O’Connor, M. & McHugh, L. A. (2019). Systematic Review of Values-Based Psychometric Tools Within Acceptance and Commitment Therapy (ACT). The Psychological Record, 69, 457–485. https://doi.org/10.1007/s40732-019-00352-7
Reilly, E. D., Ritzert, T. R., Scoglio, A. A. J., Mote, J., Fukuda, S. D., Ahern, M. E., & Kelly, M. M. (2019). A systematic review of values measures in acceptance and commitment therapy research. Journal of Contextual Behavioral Science, 12, 290-304. https://doi.org/10.1016/j.jcbs.2018.10.004