字彙知識在語言學習中是個重要的元素。學習字彙是必要的因為它協助學習者發展聽力及閱讀理解、並且幫助學習者透過口說及寫作來表達。適當的字彙學習策略可以讓學習者擁有更好的學習表現及成就。此研究的目標在於探討臺灣不同英語程度的國中生使用字彙學習策略的頻率、了解他們的學習困難、以及對於策略使用的看法。參與者為五十二位八年級學生（男性二十九位及女性二十三位）、其中的八位學生為教師推薦的受訪者。收集到的數據以量化（問卷調查）及質化（個別訪談）方法做分析。參與者的英語字彙學習困難包含記得多音節的單字、容易被一字多義的單字混淆、及單字記憶。根據調查結果，熟練程度較高的學習者偏向使用「決定」策略、而熟練程度較低的學習者較常使用「後設認知」策略。最後，受訪者提及使用字彙學習策略的重要性因為這些方法讓他們的字彙量增加、變得更有信心、並且提升成績。此研究的意義在於提供教師們作為教學參考，可以適當地設計課程、使用不同方法教導程度不同的學生們、以及幫助他們解決學習困難。

Vocabulary knowledge is an important element in language learning. Learning vocabulary is necessary because it helps learners to develop listening and reading comprehension and helps them express themselves through speaking and writing. Appropriate vocabulary learning strategies (VLSs) can improve learners’ learning performance and achievements. The purpose of this study was to explore the frequency of VLSs used by Taiwanese junior-high-school students with different proficiency levels, determine the difficulties learners face, and their perceptions of using VLSs. Fifty-two eighth-grade students (M = 29; F = 23) were recruited as participants and eight of them were recommended as interviewees by their teachers. The collected data were analyzed using both quantitative (questionnaire survey) and qualitative (individual interviews) methods. The participants’ English vocabulary learning difficulties were remembering multisyllabic words, being confused by polysemous words, and word retention. According to the survey results, more-proficient learners tended to use determination strategies more frequently and less-proficient learners applied metacognitive strategies more often. Finally, the interviewees mentioned the importance of using VLSs because these methods did help them enlarge their vocabulary size, become more confident, and improve their grades. The significance of the study is that it provides references for teachers to properly design the courses, instruct students with different approaches based on their language proficiency levels, and assist students when they encounter learning difficulties.

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