Thesis:

تاثیر پیش سازمان دهنده های گرافیکی بر عمق و وسعت دانش واژگان درمیان فراگیران زبان انگلیسی ایرانی در سطح پیش متوسط

The purpose of this study is to examine the effects of graphic organizer use on Iranian pre-intermediate EFL learners’ breadth and depth of vocabulary knowledge. To achieve this aim, both quantitative and qualitative methods were employed.The participants included fifty pre- intermediate female English learners at Sokhan Institute in Sabzevar. their age ranged from 10-20. they were divided into experimental (n=25) and control (n= 25) groups using convenience sampling in a quantitative phase of the study. The 50-item NELSON English Language Proficiency Test was used to homogenize the participants. To measure learners’ vocabulary breadth and depth knowledge, the VLT (Vocabulary Levels Test) developed by Nation (1990) and the Word Association Test (WAT) by Read (2000) were used to analyze the quantitative data obtained from the researchers' experiments, Statistical Package for the Social Sciences (SPSS) version 25 was used, and for comparing the results between groups, an independent t-test was applied. In order to collect data for the qualitative phase, as semi- structured interview was conducted with ten participants using purposive sampling. Content analysis was applied for data analysis in the qualitative stages using MAXQDA. The result of the independent t-test and content analysis revealed that graphic organizers are effective in the breadth and depth of vocabulary knowledge and they motivate pre-intermediate EFL learners in learning.

Keywords: Content Analysis, Graphic Organizer, Vocabulary Breadth Knowledge, Vocabulary Depth Knowledge