Discourse Markers (DMs) are pragmatic ties which represent the relationship between different concepts in a discourse. As Fraser (2009) puts it, these lexical expressions are free morphemes that signal a special message about or in addition to the basic message. Given the importance of DMs in the written discourse of English as foreign language (EFL) learners, this study investigated the effectiveness of two methods of interaction on improving Iranian EFL learners’ use of discourse markers (DMs) in writing compositions. The data were drawn from the comparison of the compositions of two virtual groups of EFL learners who were exposed to two types of online interactions within which different flipped instructional activities were assigned and the data were analyzed both quantitatively and qualitatively. The results showed that the learners who engaged in online discussions used higher numbers of DM in terms of both type and token. The results also showed an increase in the length of compositions in the case of those groups who embarked on online interactions and discussions of flipped content. The findings suggest that once supported by the provision of flipped content, online interactions help create authentic opportunities for learner-centered discussions which lead to an increased authenticity level of the EFL learners’ language production. The findings might also underscore the significance of flipped content and online interactions to develop other aspects of EFL learners’ pragmatic competence.
