Grounded in Vygotsky’s sociocultural theory of mind and the learner-centered approach to second/foreign language acquisition (SLA), this study investigated the extent to which the embedded differentiated instructions and diagnostic assessment, being mediated on Google Meet™ computer-mediated communication platform, would impact the improvement of mixed-ability English-as-a-Foreign-Language (EFL) learners’ English words pronunciation and their degree of engagement in language learning. In a repeated-measures research design, an intact group of 66 EFL learners were partitioned into three tiers of higher, mid- and lower achievers to complete a virtual pretest of listening comprehension, followed by a series of parallel tiered performance tasks of English words pronunciation on a weekly basis. Their task outcomes were subsequently subjected to collective computer-mediated diagnostic assessment. After 10 sessions of intervention, the participants performed on an immediate virtual posttest of listening comprehension, and a post hoc interview. The results of mixed between-within subjects analysis of variance (ANOVA) indicated both the significant learning progress by the tiers, and the outperformance of the lower achievers on the tiered tasks. The statistical results of an analysis of covariance (ANCOVA) similarly reported significant improvement of the tiers’ performance on the pretest-posttest summative assessment in this study. The inductive content analysis of the participants’ responses to the structured interview elicited seven themes which were interpreted as the participants’ strong approval of the usefulness of differentiated instructions, effectiveness of diagnostic assessment, and successful appeal of Google Meet platform.

Abstract The present study aimed at investigating the efficacy of the implementation of technology-mediated reading comprehension tasks to develop learner autonomy and metacognitive strategy use of Iranian intermediate EFL learners in a reading comprehension class. To this end, a quasi-experimental design was used in which 80 participants were selected based on their performance in a placement test (Oxford Quick Placement Test), and were assigned on a random basis to experimental and control groups. Learner autonomy questionnaire as well as metacognitive awareness of reading strategies inventory (MARSI) version1.0. were used as pretest. After 20 sessions of reading comprehension instruction in the form of technology-mediated task-based instruction in the experimental group and traditional explicit instruction for the control group, the aforementioned questionnaires were administered again as posttest. The obtained pretest and posttest scores were analyzed statistically using ANCOVA. The results indicated that technology-mediated task-based instruction was more effective in enhancing learner autonomy and metacognitive strategy use in comparison to the traditional explicit reading comprehension instruction. The results of this study bear implications for teachers, teacher trainers and material developers as they can use the tasks implemented in this study to change the role of learners from passive recipient of information to autonomous learners who resort to strategies facing a problem. Further, using these tasks in a class of reading comprehension, learners are not only input receivers but also output producers.