Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 12 4 2017 10 18 255 261 EN MohammadReza Mohammadi Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran. Maryam Salmanian Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran. Bagher Ghobari-Bonab Psychology and Education of Exceptional Children Department, University of Tehran, Tehran, Iran . Jafar Bolhari School of Behavioral Sciences and Mental Health, Iran University of Medical Sciences, Tehran, Iran. 2017 10 18 Objective: Spiritual psychotherapy has been conceptualized in the context of love and belief as principles of existence. Spiritual psychotherapy can provide an opportunity to design programs to treat conduct disorder. The aim of this study was to introduce the Spiritual Psychotherapy Package for Adolescents with Conduct Disorder and execute it as a pilot study. Method: The intervention is a manual-guided program conducted over 14 group sessions, using the perspectives of object relations and attachment approach. It was executed for a group of eight adolescent boys with conduct disorder (mean age:  17.01 years) at Tehran reformatory. The Aggression Questionnaire and the Attachment to God Inventory were completed pre- and post-intervention. Results: There were no significant differences in outcome measures from pre- to post- intervention. Cohen's dav was applied to estimate the measure of the effect size in this study. Cohen's dav measures of avoidance and anxious attachment to God showed acceptable effect sizes. However, Cohen's dav measure of verbal aggression indicated a small effect size. Conclusion: We found evidence indicating acceptability of spiritual psychotherapy among adolescents with conduct disorder in attachment to God.   https://ijps.tums.ac.ir/index.php/ijps/article/view/1213 https://ijps.tums.ac.ir/index.php/ijps/article/download/1213/658