摘要:AbstractThe present study is an attempt to investigate the effect(s) of providing feedback on EFL students’ writing performance at Islamic Azad University of Hamedan. To do this, 60 EFL students enrolled in Advanced Writing classes, in which the focus is on developing students’ composition skills, were randomly assigned to three groups: a control group, a direct-correction experimental group and an uncoded-feedback experimental group. The study lasted 7 weeks in the course of which the participants had to write paragraphs on the topics assigned on a weekly basis. The papers were all read by the researcher teacher and returned back to the students providing direct corrections on the errors made on participles and resumptives(two problematic areas to Iranian learners of English) to those in the first experimental group, uncoded feedback on such errors to those participants in the second experimental group, and no feedback to those in the control group.The results of a one-way ANOVA indicated that teacher feedback was a significant factor influencing students’ writing performance in the two experimental groups. The results also pointed to a significant difference in the performance of the students in uncoded-feedback group over those in the direct-correction feedback group and no-feedback control group. The results of the study support the claim that error feedback in general helps in EFL learners’ better writing performance and that uncoded feedback, compared with direct corrections, is providing a more effective strategy to react to students’ writings.