درخت حوزه‌های تخصصی

The present study aims at investigating English lexicon polysemy within the cognitive approach to study the way based on which Persian language learners learn English lexicon with the concepts used in cognitive linguistics such as, prototype, polysemy, categorization, etc. The nature of the methodology used in this qualitative research for studying the meanings of English lexicon is a descriptive-analytic method. After the semantic analysis of the English lexicon based on the model of Dirven & Verspoor (2004), it was found that the meanings of the lexicon are classifiable based on theoretical procedures on cognitive semantics. The authors are trying to show the cognitive concepts in cognitive linguistics can be used for teaching English lexicon. The findings, generally, showed that the unconscious knowledge of learners in learning the cognitive structure of the meanings of the lexicon has a meaningful relationship with learning. The results also revealed that the lexicon has a semantic network semantically, in which the notion of core or prototype is located in the center of the semantic network and the rest of the meanings can be examined as the peripheral meanings of a lexicon.

High-stakes tests exert impacts on teachers’ perceptions, methodology, practices, and materials used in the classroom. However, previous research studies have overlooked the role of teachers’ past experiences in the tests and their instructional planning prior to, during, and after the preparation courses. This study inspected the washback effect of IELTS examination on Iranian EFL teachers’ instructional planning considering their IELTS related experiences. Through a mixed-methods research design, two sets of questionnaires were distributed among 120 Iranian IELTS instructors to examine the IELTS washback effect on their perceptions of instructional planning. Afterward, a semi-structured interview was held with 15 instructors, selected from among 120 initial participants, to supplement the previously collected data. The results of one sample t-test and Wilcoxon signed-ranks test indicated that the current level of Instructional planning at item and total score level was beyond average. Likewise, the results of Spearman rho indicated a positive and significant relationship between instructors’ instructional planning and their past IELTS related experiences. It was also found that the IELTS examination made the instructors develop exam-oriented plans by focusing on the students’ test performance. The results are invaluable for IELTS instructors in that they can raise their knowledge and awareness about the nature and scope of IELTS washback effect and ways to develop exam-oriented plans.

This study explored the impact of task complexity on task performance of Iranian lower-intermediate and advanced language learners. It also investigated how working memory was related to task performance and mediated the influence of complexity conditions on language performance. Task complexity was operationalized by designing differing tasks along the +/- reasoning and the +/- few elements dimensions. Eighty Iranian EFL learners (40 lower-intermediate and 40 advanced) carried out argumentative tasks which differed in complexity level. Working memory capacity was measured by applying the Persian translation of Wechsler's (1987) working memory test, and task performance was measured in terms of accuracy and fluency. The results revealed that for lower-intermediate learners, task complexity led to decrease in accuracy in the complex tasks, while fluency was boosted in simple task condition. For advanced learners, task complexity resulted in improved accuracy, while fluency decreased in complex condition. The results of multivariate analyses revealed that learners' language performance in the complex group significantly differed from that of the simple group on the combined dependent variables for both lower-intermediate and advanced learners. There was no significant correlation between working memory and any performance measures.