While a majority of the effect sizes in Table 3 are small in magnitude (Cohen, 1992) there are also a great deal that can be considered medium. It would not be expected to find all of the effect sizes to be large, as measures of normal personality would not fully account for all the variance in a measure of abnormal personality (Trull et al., 2003). Nevertheless, the findings are consistent with the hypothesis that maladaptive personality traits can be understood as abnormal variants of general personality traits (Widiger & Trull, 2007).
