The International Journal of Indian Psychology ISSN 2348-5396 (e) | ISSN: 2349-3429 (p) Volume 4, Issue 2, No. 94, DIP: 18.01.159/20170402 ISBN: 978-1-365-84229-0 http://www.ijip.in | January-March, 2017 © 2017 Mahvelati A, Shahriari M, Abadi G, Shamlou Z; licensee IJIP. This is an Open Access Research distributed under the terms of the Creative Commons Attribution License (www.creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any Medium, provided the original work is properly cited. Comparison of Three Methods of Existential Psychotherapy, Individual, Group and Combined To Increase Marital Satisfaction Azadeh Mahvelati 1 *, MahSima PourShahriari 2 , Bahram Ali Ghanbari Hashem Abadi 3 , Zohreh Sepehri Shamlou 4 ABSTRACT The purpose of the present study is to investigate the effectiveness of three: individual group and combined methods of psychotherapy based on the existential approach, in order to compare the increase in marital satisfaction of married women. The method used by the authors of this study was the Single Subject Assessment A-B. The statistical society of this study consisted of married women living in Mashhad’s 9th municipal district of Iran. The study’s sample selection followed a non-random-available method. Study’s tools consisted of demographic questionnaire, cognitive interviews and analog questions. Data analysis was conducted by means of presenting charts and graphs and clinical significance. Investigating the findings of analog questions indicated that combined method of existential psychotherapy is more effective in increasing marital satisfaction than group and individual existential therapy, and that group existential psychotherapy is more effective than individual existential therapy. Also, our follow up investigation, three months after the interventions showed that the effects of combined method of the end of therapy on married women lasted longer than individual and group methods of existential psychotherapy, also the effects of individual method of existential psychotherapy lasted longer than group method of existential therapy. Keywords: Effectiveness, individual group and combined methods of existential therapy, marital satisfaction, single subject assessment A-B 1 PhD Student of Counseling at Al-Zahra University of Tehran, Tehran, Iran 2 Faculty Member of Educational Sciences and Psychology Department of Al-Zahra University of Tehran, Tehran, Iran 3 Faculty Member of Educational Sciences and Psychology Dept. of Ferdowsi University of Mashahad, Mashahad, Iran 4 Faculty Member of Educational Sciences and Psychology Dept. of Ferdowsi University of Mashahad, Mashahad, Iran *Responding Author Received: February 23, 2017; Revision Received: March 19, 2017; Accepted: March 23, 2017