Personality Disorders: Theory, Research, and Treatment (Jun 21, 2018): No Pagination Specified The alternative model for personality disorders includes a single dimension of personality dysfunction severity (Criterion A) and five dimensions of personality dysfunction styles (Criterion B). Some consider Criteria A and B distinctions redundant, and this appears mostly true in cross-sectional designs. The present research demonstrated that incremental validity can be found when examining personality dysfunction longitudinally.. To read the full article, log in using your NHS OpenAthens details.