Abstract
The present study investigated the effect of using PowerPoint on Iranian EFL intermediate and advanced learners’ knowledge of abstract vocabulary. To this end, two experimental and two control groups (n=120): the experimental group using PowerPoint and the control group using traditional methods of instructions took part in this study. A pre-test and a post-test of vocabulary were administered to all groups. The data were analyzed using t-tests and one-way ANOVA. The results revealed that the learners in the experimental groups received higher scores in vocabulary test and using PowerPoint had a greater effect on intermediate learners’ vocabulary knowledge.
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