The aim of this research design was developed to validate the IPO 83 items in Argentine. IPO 2001 was administrated to non-clinical sample in a voluntary and anonymous way. Also it was applied to a clinical sample after approval of The Ethical Independent Committee of The Hospital Colonia Domingo Cabred, where the clinical sample was recruited. The subjects involved in the non-clinical sample were recruited from both public and private universities from different regions of the country (n=1068) and it was carried out on 2003-2004; distribution gender (66,8% female and 33,2% male); age median 22, SD (5,2). The clinical sample was recruited from both inpatients and outpatients sample at the Colonia Domingo Cabred Hospital in Buenos Aires, which fulfill BPD diagnosis according to DSM-IV TR (n= 169); distribution gender (female, 60,4%, male 39,6%), age median 28, SD (10,8). Statistical comparison was made using non parametric tests. Statistical differences were confirmed through Mann-Whitney Test, Two-Sample Kolmogorov-Smirnov Test and Kruskal-Wallis Test for independent variables. ;&2-5.2! Level of personality organization was significant different in both samples through five variables studied in this research. Primitive defense mechanisms (PD, p<0.001), identity diffusion phenomena (ID, p<0.001), impairment in reality testing (RT, p<0.001), aggression (A, p<0.001) and disturbances in moral values (MV, p<0.001) are more present in BPD patients recruited from clinical sample than in non-clinical sample. The statistical analysis through three nonparametric tests mentioned above has shown that all five variables represent significant different values in both samples. Another interesting result is no gender differences were found both in clinical and non-clinical samples. G$#/5-2*$#2!! The IPO self report format interview would help interviewers to explore these three dimensions through the PD, ID and reality testing (RT) items. It is generally accepted that a lower level of defense mechanisms is present in severe psychopathology, as well as the identity diffusion phenomena. Disturbances in reality testing expressed by difficulties in clearly differentiating self from non-self representations are common in the borderline realm, as well are the oscillating representations of the social common sense of reality. It is very common to observe that borderline patients often behave under the aggression domain: impulsivity, self-injuries and suicidal attempts and gestures. These symptoms are explored by the aggression (A) subscale of the IPO. It is also very well known that these patients have disturbances in the integration of the superego structure and the IPO format interview can reveal these characteristics through the moral values (MV) subscale. Although the IPO is not used as a clinical diagnostic tool, it would allow experts to distinguish between severe psychopathology and healthy people, while exploring these three main subscales (PD, ID, RT) of the IPO which reveal the structure of the psychic function, and the others (A and MV) subscales reveal aggression control behavior and superego structure. G$#.1/.\! Persano, Humberto Lorenzo (Argentine Psychoanalytic Association (APA) & University of Buenos Aires (UBA); Gutnisky, David (UBA); Ventura, Adrian (APA- UBA); García Lizziero, Ezequiel (UBA); Chertcoff, Lisandro (UBA). E-mail: hpersano@gmail.com
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