Second or foreign language (L2) learners’ development of interlanguage pragmatic (ILP) competence to understand and properly interpret utterances under certain social and cultural circumstances plays a pivotal role in the achievement of communicative competence. The current study was designed to explore the effects of synchronous computer-mediated communication (SCMC) and asynchronous computer-mediated communication (ACMC) course modules delivered through social media networks (SMN) on the development of the Iranian L2 learners’ comprehension of implicatures. The participants of the study were 90 English-as-a-foreign-language (EFL) undergraduate students attending three intact classes. The classes were randomly assigned to one control and two experimental (SCMC and ACMC) groups. An open-ended implicature comprehension test was used to assess students’ ILP development in this pretest-posttest comparison-group study. The control group received the traditional teacher-fronted instruction, and the S/ACMC groups received instruction via synchronous and asynchronous modules of SMNs for 4 months, respectively. Students’ attitudes towards the CMC-based courses were also sought. Split-plot ANOVA results indicated that both experimental groups developed significant ILP ability to comprehend and interpret L2 implicatures after the instruction; however, by comparison, the ACMC group improved more considerably. It is concluded that, first, comprehending L2 implicatures is not impervious to computer-mediated instruction and, second, different CMC affordances may result in differential ILP developmental effects in teaching L2 pragmatics. The findings can help L2 teachers decide how to use CMC affordances and SMN modules to raise L2 learners’ pragmatic awareness

Various studies have confirmed the influential role of corrective feedback (CF) in the development of different linguistic skills and components. However, little, if any, research has been conducted on comparing types of linguistic errors treated by teachers through CF. To bridge this gap, this study sought to investigate the linguistic errors addressed and the types of CF provided by teachers. To this end, the classes of 40 teachers teaching at the intermediate level were audio-recorded for two successive sessions. The detailed analysis of around 128 hours of classroom interactions showed that explicit correction was the most frequent CF type, accounting for 48.5 percent of all CF types provided, and recast was the second most frequently used CF type, constituting 29.5 percent of all CF types. All the other CF types (i.e. request for clarification, confirmation check, repetition, metalinguistic feedback, elicitation, and multiple feedback) constituted 22 percent of the CF. Repetition was the least frequently used CF type, amounting to 0.66 percent of the CF given by teachers. As to the linguistic focus of CF, pronunciation errors were found to be the mostly noticed target for teachers’ CF, constituting 47 percent of all errors addressed, while vocabulary was the least frequently addressed linguistic target, accounting for 17.5 percent of all errors. The study suggests that teachers prefer explicit corrective strategies over implicit ones and that they provide CF mainly to correct pronunciations errors. The study suggests that there is a need for change in the types of CF teachers use and the relative attention they assign to different linguistic error types they treat through CF