Learners’ self-regulation is of paramount importance in online language learning. Thus, the present study was conducted to compare three online instructional methods of Technology-Mediated Task-Based Language Teaching (TM-TBLT), Problem-Based Instruction Online (PBIO), and Online Flipped Learning (OFL) with each other and with lecture-based online teaching in terms of their effect on language learners’ self-regulation. To this end, 120 intermediate-level English learners were selected through convenience sampling, screened through the Oxford Quick Placement Test (OQPT), and assigned (randomly) to one control and three experimental groups. They received instruction according to the principles of TM-TBLT, PBIO, OFL and a conventional lecture-based method, respectively. The data were collected using an online self-regulated English learning (OSEL) questionnaire and analyzed using Analysis of Covariance (ANCOVA). The findings revealed that all three experimental treatments had significant effects on online language learning self-regulation. The comparisons showed that all three instructional methods were equally effective in improving the participants’ online self-regulation. The findings will have practical implications for teachers to choose the best-fitting online instructional methods for improving learners’ self-regulation in online contexts. These findings can also help syllabus designers and material developers to write syllabi or create materials with special attention to fostering language learners’ self-regulation.
