Probing into the Influence of Web Based and Mobile based Instruction on Vocabulary Learning; Lexical Depth and Breadth in Focus

چکیده

Purpose: This study inquired about the influence of web and mobile based instructions on the depth and breadth of lexical knowledge among Iranian EFL learners. Design/methodology/approach: Through conducting a placement test, 120 out of 150 EFL learners were selected and then divided in to three identical groups, each consisting forty learners. One experimental group was provided with web-based instruction, while the other experimental group has been taught suing MALL. On the other side, a traditional method of teaching vocabulary was presented for the control group. Prior to starting the experiment, the learners in the three groups were given a vocabulary pretest. Then, the instruction lasted eight sessions. In web-based group, the learners were provided with the Web assisted software programs for vocabulary learning, while in the second experimental group the learners received instruction via their mobile phones by a mobile application. However, for control group, vocabulary was taught using a conventional method. Finally, the posttest was conducted to find out the efficacy of the instructions. The results were analyzed based on ANCOVA. Findings: Results suggest both instructions were of significantly positive influence on the breadth and depth of lexical knowledge of learners. Results also showed that both web based and MALL instructions had nearly the same effect on EFL learners’ lexical breadth and depth. Finally, implications concerning pedagogical and theoretical issue are presented. Originality: The innovation of this research is the combination of Web Based and Mobile based Instruction on Vocabulary Learning with a focus on Lexical Depth and Breadth in Focus.