TY - JOUR T1 - Iranian EFL Learners’ Perception of the Efficacy and Affordance of Activity Theory-based Computer Assisted Language Learning in Writing Achievement JF - Teaching English as a Second Language Y1 - 2017, LA - EN LK - ensani.ir VL - 2017, IS - 4 UR - http://ensani.ir/fa/article/386408 SP - 33 EP - 66 ID - 386408 AU - آرزو حاجی مقصودی AU - پرویز مفتون KW - Activity theory KW - affordance KW - CALL KW - writing achievement ER -