Özet:

The purpose of the present study is to investigate the effectiveness of an online tool, Quizlet, on vocabulary achievement of English as a Foreign Language (EFL) students at a state university. It is also aimed to investigate the perceptions of the students of using Quizlet for vocabulary learning. The participants of the study consist of 92 university students enrolled in a preparatory program at a state university in Turkey in fall semester of the 2018-2019 academic year. Through a quasi-experimental research design, the outcomes of Quizlet on the students’ vocabulary achievement and their perceptions of Quizlet were analyzed statistically. When the post-test scores of the experimental and control group were analyzed, it was found that the experimental group surpassed the control group although the difference between the two groups was not statistically significant. The findings of the perception questionnaire revealed that the students’ perceptions of Quizlet were positive. The triangulation of the quantitative data indicated that Quizlet was an effective tool for enhancing vocabulary in English language learning and it was highly favored by EFL learners.

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