The study analized the effects of brief group therapy using the MMPI o
n a group of 21 patients aged 19 to 27 years, under weekly Psychoanali
tic Group Therapy for six months. Test-retest of MMPI basic scales (be
fore and after group therapy) were analyzed using a computerized scori
ng system. Significant differences were found between pre and post-tes
t MMPI scores on the F, K, Hs, D, Hi, Pt and Is scales. It is also ass
umed that patients' understanding of problems and their perceived capa
city of problem solving improved as a consequence of therapy.