en Occupational Therapy Occupational Therapy Original Research Original Research <strong>Background: </strong>Self-determination skills enable to support an individual&rsquo;s needs and make decisions to function independently. Improvement of self-determination skills has had a positive result for adolescents at risk of Emotional and Behavioral Disorders (EBD). The aim of this study was to investigate the effect of occupational therapy interventions on the self-determination skills of adolescent girls at risk of emotional-behavioral disorders.<br> &nbsp;&nbsp; <strong>Methods:</strong> In this single-blind control trial study, 14-16-years-old girl students (n=54) at risk of &nbsp;EBD were recruited by cluster sampling from secondary high schools of Tehran, Iran. Youth self-report Questionnaire (YSR) was used to include adolescents at risk of EBD in the study and were randomized into the intervention (n=27) and control group (n=27) by block randomization. The Student Self-Determination Scale (SDSS) and the Self-determination Parent Perception Scale (SDPPS) were used to collect data. Students in the intervention group participated in 8 &ndash; once a week- sessions of occupational therapy and the control group received no training. Data were analyzed by repeated-measures analysis of variance (RMANOVA), Bonferroni test and SPSS 16.0 version. The significance level was set at 0.05.<br> &nbsp;&nbsp; <strong>Results: </strong>The score of self-determinations (SDSS) increased significantly in the intervention group after the intervention (p<0.001). Although the mean scores of self-determination at follow-up have increased in the intervention group compared to the post-test. No significant differences were found (p>0.05); also, the score of parents&#39; perception of student self-determination (SDPPS) increased but there were not significantly different (p=0.064).<br> <strong>&nbsp;&nbsp; Conclusion:</strong> The findings indicated self-determination skills could be taught to adolescents at risk of EBD in OT sessions. Since self-determination has been identified as the necessary skills for adolescents at-risk to transition into adulthood, occupational therapists have an important role in promoting self-determination skills in adolescents at risk of EBD. Occupational Therapy Interventions, Self-Determination, Emotional And Behavioral Disorders, Adolescents 435 442 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-5654-1&slc_lang=en&sid=1 Elahe Hojati Abed hojatiabed.e@iums.ac.ir 200319475328460063268 200319475328460063268 No Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Narges Shafaroudi shafarodi.n@iums.ac.ir 200319475328460063269 200319475328460063269 Yes Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Malahat Akbarfahimi akbarfahimi.m@iums.ac.ir 200319475328460063270 200319475328460063270 No Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Armin Zareiyan a.zareian@ajaums.ac.ir 200319475328460063271 200319475328460063271 No Department of Community Health, School of Nursing, AJA University of Medical Sciences, Tehran, Iran Akram Parand akramparand@yahoo.com 200319475328460063272 200319475328460063272 No School of Psychology, Tehran University, Tehran, Iran