online vs. incidental vocabulary learning: a case of computer-assisted language learning

This present study aimed to investigate comparative usefulness of online versus incidental vocabulary learning on intermediate level iranian vocabulary learning. in doing so, forty two students at a language institute in qom were both taught and tested on 500 english content words. two experimental groups were taught the words via different ways. the first group (group a, n=21) get it in a computer-assisted language learning (call) program through a vocabulary learning system (quizlet, http://quizlet.com). and the second group (group b, n=21) were offered some reading texts containing the same words and exposed students incidentally to new vocabularies. the results presented that the students who used online program in group a outperformed the students in group b. moreover, a follow-up post-test given a few months later evidenced that the students in group a better remember the words studied via quizlet.