including language proficiency, motivation,
effort ,and family background affect college students’ ESL vocabulary strategy use? Subjects in this study were
around 450 first grade students at Fooyin University. Results of the study showed that the variable that had
greatest effect on learners’ vocabulary strategy use was motivation. Another important factor affecting
vocabulary strategy use was family background, including family involvement and years of study. Results of the
study suggested that, teachers’ encouragement to the students for adopting the most useful and effective
vocabulary learning app