Tehran University of Medical Sciences Auditory and Vestibular Research 2423-480X 28 3 2019 06 12 164 172 EN Mahdiyeh Azizi Department of Psychology, School of Humanities, Science and Arts University, Yazd, Iran Mohsen Saeidmanesh Department of Psychology, School of Humanities, Science and Arts University, Yazd, Iran Fateme Kazemi Department of Psychology, School of Humanities, Science and Arts University, Yazd, Iran Vahide Radaie Department of Psychology, Science and Research Branch, Islamic Azad University, Tehran, Iran 2018 08 05 2018 12 11 Background and Aim: One of the common behavioral disorders of hearing-impaired children is aggressive behavior, which can affect social adjustment in their adolescence. This study was designed to investigate the effectiveness of group counseling based on problem-solving on aggression and social adjustment of hearing-impaired students. Methods: This study is quasi-experimental with pretest posttest design and a control group. The study population was all adolescents with hearing impairment referred to Yazd Speech Therapy Centers, Yazd City, Iran. A total of 30 students were selected from the referred hearing-impaired students with high aggression and low social adjustment. Then they were randomly assigned into control (n = 15) and experimental (n = 15) groups. The study instruments were the California social behavior and Buss and Perry aggression inventory. The group counseling based on problem-solving intervention consisted of 7 one-hour sessions, presented for the experimental group. We analyzed the obtained data by repeated measures analysis of covariance. Results: Group therapy based on problem-solving can reduce aggression (p < 0.001) and increase social adjustment (p = 0.04). Conclusion: The professionals in this field are recommended to use group therapy based on problem-solving. https://avr.tums.ac.ir/index.php/avr/article/view/741 https://avr.tums.ac.ir/index.php/avr/article/download/741/330