Watts, A., Smith, G., Barch, D., & Sher, K. (2020). Factor structure, measurement and structural invariance, and external validity of an abbreviated youth version of the UPPS-P Impulsive Behavior Scale. Psychological Assessment, 32(4), 336-347. https://doi.org/10.1037/pas0000791

DeYoung, C., Chmielewski, M., Clark, L., Condon, D., Kotov, R., Krueger, R., … Personality, W. H. N. (2022). The distinction between symptoms and traits in the Hierarchical Taxonomy of Psychopathology (HiTOP). Journal of Personality, 90(1), 20-33. https://doi.org/10.1111/jopy.12593