The purpose of this study was to investigate the effectiveness of DIR-based transformation-change model on reducing internet addiction among female students of Mashhad city. In a semi-experimental design, 30 female students (9-12 years old) who were selected by multi-stage cluster sampling were randomly assigned into two experimental and control groups. For the experimental group, eight sessions of 45 minutes of the transformation protocol protocol-the relationship-based differences were performed individually. Young's Internet addiction test was used to evaluate Internet addiction. The effect of the intervention was performed using pretest, post-test and follow-up six months. Data were analyzed using descriptive statistics and ANCOVA. The results of the data analysis indicated that the average of Internet addiction scores in the experimental group significantly decreased compared to the control group and the effect of the intervention after six months also continued. Therefore, transformational model-communication-based differences can be considered