This study examines the claim that vocabulary learning and retention are dependent on a task's involvement load (i.e., need, search, evaluation), as proposed by Hulstijn and Laufer (2001a). The study aims at comparing the effects of task types and task involvement load on vocabulary retention for Korean EFL university students. More specifically, this study was designed to test whether differential levels of task involvement loads lead to equally effective results to vocabulary retention when the total involvement index being equal. Three types of productive word-focused tasks (gap-filling using a dictionary, writing original sentences, and gap-filling through word transformation) were used to examine the interplay of involvement index and task types. The result indicated that there were significant main effects of task types, test types, and proficiency levels. The results also indicated that there were significant interaction effects of task types on the retention tests, proficiency levels on the retention tests, and task types×proficiency levels on the retentions. The pedagogical implications and further research directions are discussed.

I. Introduction
II. Literature Review
    1. Task Effectiveness for Vocabulary Retention
    2. Involvement Load Hypothesis
III. Methodology
    1. Participants
    2. Target Vocabulary Selection
    3. Tasks by Tasks-induced Involvement Load
    4. Procedures
    5. Vocabulary Retention Tests and Scoring
IV. Results and Discussion
V. Conclusion
References

• HaeRan Kang(Division of English Language & Liter Pukyong National University)
• Yousun Shin(Division of English Language & Literature Pukyong National University)