Abstract
This study investigated the relationships between vocabulary learning strategies and learner's 2 types of vocabulary size (receptive vocabulary and productive vocabulary) in Hungarian JFL context (N=101). In the data collection, I used a questionnaire to investigate learners' strategy use, and passive vocabulary size and controlled active vocabulary test to measure their vocabulary size. I identified several approaches of vocabulary learning by multiple regression analysis and cluster analysis, and found the characteristics of two successful vocabulary learners groups and unsuccessful one. The majority of the successful learners frequently used wide variety of learning strategies, and controlled their own study by metacognitive regulation, but the unsuccessful learners' strategy use is passive and they did not control their studies by themselves. In addition, the minority of successful learners who are superior especially for productive vocabulary size select strategies effectively. They are guessing meaning of vocabulary, using dictionary, memorizing through encoding, and activating of vocabulary. As a result, this group keeps the largest vocabulary size among these participants.
