本研究的主要目的在探討研究者所發展的「同儕回饋」作文教學模式對於高中生作文表現之影響。「同儕回饋模式」主要根據寫作認知歷程模式與社會互動模式，並結合同儕互評之相關研究為核心所建構而成。 本研究以新竹縣某國立高中二年級三個班級為研究對象，採準實驗研究設計中的不等組前後測設計，教學實驗共實施十一週。第一類組與第二類組的班級採取「同儕回饋」作文教學，第三類組的班級為「範文寫作」教學；其中「同儕回饋」作文教學包含「接受回饋」與「給予回饋」兩種實驗處理。 資料蒐集後進行統計分析，並以學生作品作為分析之參照，分別簡述如下： 1.以前測為共變項，將前測差異影響予以排除後，進行共變數分析，以了解自變項對依變項後測的影響。 2.根據受試者在教學實驗後所知覺到的作文表現情況進行回饋問卷調查，並對不同組別在各問題進行平均數差異檢定。 本研究之結果如下： 1.接受回饋與給予回饋組之整體作文表現的提升顯著優於範文寫作組，且給予回饋組在自我知覺「作文表現能力的提升」亦高於範文寫作組。 2.同儕回饋中接受回饋組與給予回饋組在整體作文表現的提升無顯著之差異。 3.以班級而言，第一類組同儕回饋在作文表現的提升是最為顯著。 4.以作文表現「組織結構」而言，第二類組學生對於「給予回饋」的提升效果是優於「接受回饋」實驗處理。 研究結果顯示，在高中階段的作文教學中應用「同儕回饋」模式對於學生作文表現有正面之影響，良好的同儕互動與有品質的同儕回饋意見將促使學生投入學習活動之中，進而提升在作文上的表現。 關鍵字：同儕回饋、範文寫作、作文表現 / The main purpose of this study was to explore the effects of the “peer feedback writing instruction model” developed by the researcher on the writing performance of senior high school students. This peer feedback model was constructed based on the cognitive processing writing model and the the social interaction model, and some peer evaluation theories. The teaching experiment lasted for eleven weeks, in which the quasi-experimental nonequivalent pretest-posttest theories were applied. Participants were juniors in three different classes of a national senior high school in Hsin-Chu County. Students in Class One and Class Two participated as the peer-feedback group, which was further divided into two subgroups: the feedback-receiving group and the feedback-giving group. Students in Class Three participated as the control group, which was also the model-essay group. Listed below were analyses of the experimental data with reference to students' writings: 1.In the experiment, the pretest was set as covariance. To investigate the influence of independent variable on the dependent variable(posttest) , one-way ANCOVA statistics was conducted after exclusion of pretest-difference. 2.After the teaching experiment, a feedback-questionnaire survey on how the participatns perceived their writing performance is carried out. One-way ANOVA is applied for every question among different groups. The results of the study were as follows: 1.Overall writing performance of students in the feedback-receiving and feeback-giving groups was significantly better than the model-essay group. For self-perception of the improvement in writing ability, the feedback-giving group also scored higher than the model-essay group. 2.In terms of improvement in overall writing performance, no significant difference was found between the feedback-receiving and feedback-giving groups. 3.Classwise, Class One benefited most from peer-feedback and hence made the most improvement in writing performance. 4.As far as structure organization in writing is concerned, Class Two students in the feedback-giving group performed better than students in the feedback-receiving group. The study results showed that the peer feedback model has a positive effect on the writing performance of senior high school students. Peer interaction and peer feedback of good quality stimulate students into learning, and hence improve their writing performance. keywords:peer feedback、writing with model essay、 writing performances