This study investigated the effect of self-assessment and peer-assessment on the quality of students’ transla- tion. Participants of the study were 60 male and female students. They were selected from the senior stu- dents studying English Translation and divided into two groups: self-assessment and peer-assessment. The study adopted a pretest-posttest design, and students’ translation quality was measured before and after providing them with instructional treatment through self-assessment and peer-assessment using a translation quality checklist. Data were gathered during the pretest and posttest phases and analyzed using independent and paired samples t-tests. The results of the study indicated that both self-assessment and peer-assessment were effective in improving the quality of the translation of the students. The comparison of the posttest mean scores also revealed that peer-assessment was significantly more effective than self-assessment in promoting the participants' quality of translation. پرونده مقاله