the effect of subtitling on vocabulary learning of iranian intermediate efl learners

this study was an attempt to investigate the effect of subtitling on vocabulary learning among iranian intermediate students. to find the homogeneity of the groups, tofel test was administered to student in kish mehr institute in garmsar. after analyzing the data, 60 participants (female students) who scored within the range of one standard deviation above and below the mean, were selected as homogeneous out of 150 participants.they were assigned to two groups of 30 students, with the same proficiency level. then, they received vocabulary items which had been developed by the researcher as the pre-test. t-test was used to confirm that all groups didn’t differ statistically in terms of their vocabulary learning abilities. the students in the experimental group received 18 sessions of treatment, instructed using bimodal subtitling,while the control group received conventional method for watching the same movie. finally, all groups received the post- test. it was a vocabulary test followed by 10 matching items. t-test was used to compare the mean scores of two groups. statistical results showed that there was a significant difference between the experimental group and the control group. so, the hypothesis was rejected at this point. also, comparing the means in the post- test showed that bimodal subtitling was more effective than no subtitle group.