This study investigates the effects of input-based and output-based instructions on the acquisition of second language (L2) request modifiers. Four intact classes were randomly assigned to textual enhancement (TE), input flooding (IF), output-based instruction (OI), and control (CO) groups. The TE group watched some captioned videos on requests…

The present study sought to uncover the effect of previously acquired languages, Azeri and Persian, on the acquisition of English adjective properties of bilingual learners. It further investigated the role of L3 general proficiency and its interaction with the effect of previously acquired languages on the development of English adjective…

With the increasing attempts to use gender-fair language, different studies have investigated this issue from different viewpoints. To find an epicene pronoun used as a third-person singular, some research has been conducted investigating them in various contexts, yet few studies have focused on cultural differences. Since how to use language…

The present study attempted to investigate the effects of audio input enhancement on EFL learners' retention of intensifiers. To this end, two research questions were formulated. In order to address these research questions, this study attempted to reject two null hypotheses. Pretest-posttest control group quasi-experimental design was employed to…

Second Language learners' oral task performance has been one of interesting and research generating areas of investigations in the field of second language acquisition specially, task-based language teaching and learning. The main purpose of the present study is to investigate the effect of focus on form and task complexity on L2 learners' oral…

Han's (2009, 2013) selective fossilization hypothesis (SFH) claims that L1 markedness and L2 input robustness determine the fossilizability (and learnability) of an L2 feature. To test the validity of the model, a pseudo-longitudinal study was designed in which the errors in the argumentative essays of 52 Iranian EFL learners were identified and…

This study investigated the developmental and fossilized prepositional errors in Persian EFL learners' compositions at three levels of proficiency; participants were divided into lower-intermediate, upper-intermediate, and advanced levels. For each participant, four compositions were collected, and after identifying the prepositional errors for…