Thesis (M.A.) from the year 2023 in the subject Psychology - Intelligence and Learning Psychology, grade: 1, , course: Educational Technology, language: English, abstract: The aim of this study was to investigate the effect of blended collaborative learning on Iranian learners' understanding concept skill and test these hypotheses: 1. Blended collaborative learning increases the ability to understand and correctly recognize the meanings of words in eighth grade students. 2. Blended collaborative learning increases the ability of eighth grade students to comprehend and identify appropriate vocabulary to complete incomplete texts. 3. Blended collaborative learning increases the ability of eighth grade students to understand reading English texts. Among the statistical population of eighth grade male students in Birjand in the academic year 2021 which numbered 637 people, 30 students were purposefully divided into two experimental and control groups using the available sampling method. After taking the Oxford Placement Test and purposeful appointment of learners in experimental and control groups, a pre-test was taken. Students in both groups were trained in English text comprehension techniques and skills for 4 weeks. The difference was that the students in the control group were trained individually in blended method (n=15) and the students in the experimental group were trained in blended collaborative method (n=15). Two standard research tools were used to collect the data of this study. The first research tool was the concept comprehension test to determine students' level of concept comprehension ability (OPT). The second research tool was a teacher-made test that was used as a pre-test, post-test and delayed post-test.

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Morteza Bakhtiarvand got his Ph.D. of Educational Technology from Department of Educational Technology, Faculty of Psychology and Education, Allameh Tabataba'i University, Tehran, Iran, in 2022. He received his M.A. (Master of Art) in Educational Technology from Allameh Tabataba'i University, Tehran, Iran, in 2016. He received his M.A. (Master of Art) in TEFL (Teaching English as a Foreign Language) from Research and Science Center of Islamic Azad University of Ahvaz, Khuzestan, Iran, in 2006. He received his B.A. (Bachelor of Art) in TEFL from Islamic Azad University of Dezful, Khuzestan Iran, in 2004, and received his A.A (Associate of Art) in TEFL from Prophet Muhammad (PBUH) Teacher Training Center of Ahvaz, Khuzestan, Iran, in 2001. He is certificated in Mathematics and Physics from Sahel Ibne Abdullah Tostari Pre-University Center of Shushtar, Khuzestan Iran, in 1999.