Subject-descriptors. Personality disorders are characterized by long-standing and pervasive dysfunctional patterns of cognition, affectivity, interpersonal relations, and impulse control that cause considerable personal distress. The number of patients with personality disorders is considerably prominent (the prevalence of borderline personality disorder is estimated to be between 15% and 25%) and there is a considerable lack of empirical research on the effectiveness of psychotherapy in treatment with these …show more content…
The conclusions that both psychodynamic therapy and cognitive behavior therapy are effective methods of treatment for personality is supported statistically. The evaluation of the meta-analysis yielded an overall effect size of 1.46 and 1.00 respectively including only sources that used standardized methods of diagnosis for personality disorders; studies that applied reliable and valid instruments for assessment and reported data that allowed calculation of with-in group effect sizes or assessment of recovery rates. When necessary the authors even went so far as to use other statistics to calculate effect sizes such as t or chi-square