The study aimed to investigate the effectiveness of emotion regulation training on the psychological resilience of girl students with self-harming behavior. The present study was a semi-experimental study with pre-and post-test with a control group design. The statistical population of the study included all female students aged 12-15 years studying in the elementary and middle school in Tehran in the academic year 2019-2020. Multi-stage random sampling was performed. The sample consisted of 36 girl students who had self-harming behavior that was randomly assigned to two groups (18people emotion regulation training group and 18 people control group). For data collection, we the used Self-Harm Inventory and the Connor‐Davidson resilience scale (CD‐RISC). The experimental group received their emotion regulation training in eight sessions of 60 minutes per week and the control group received no training. One-way analysis of covariance (ANOVA) on the SPSS software version 24 was used for data analysis. The results of the analysis of variance showed that emotion regulation training was effective in improving psychological resilience in students with self-harming behavior. Hence, by designing training programs for the regulation of emotion and including them in the curriculum of students, the necessary basis should be provided to strengthen related skills.
