Abstract 1. Introduction 2. The Phonological and Phonetic Differences between English and Korean Liquids 3. Method 3.1. Subjects 3.2. Material 3.3. Procedure 3.4. Rating Procedure 4. REsults 4.1. Effects of Formal Instruction 4.2. L1 Interference: Liquid Types or Phonological Positions 5. Discussion 6. Conclusion References