Widiger, T., Bach, B., Chmielewski, M., Clark, L., DeYoung, C., Hopwood, C., … Thomas, K. (1969). Criterion A of the AMPD in HiTOP. Journal of Personality Assessment, 101(4), 345-355. https://doi.org/10.1080/00223891.2018.1465431 (Original work published 1969)