Investigating the Effectiveness of Computer-Assisted Language Learning (CALL) in Improving Pronunciation: A Case Study

Abstract

This study examined the effectiveness of incorporating computer-assisted language learning in instructing pronunciation to adult English as a second language (ESL) learners. The Technology Enhanced Accent Modification (TEAM) program, a computer software, was used to enhance the pronunciation of international graduate students at a U.S. university hoping to become certified international teaching assistants. Special emphasis was given to improving suprasegmentals (e.g., stress, rhythm, and intonation) in addition to segmentals (e.g., vowels and consonants). This case study focused on two male Korean graduate students, majoring in science, and investigated how these individuals enhanced their pronunciation and oral English proficiency in terms of native-like quality and fluency. Data from two months of direct observation, an oral interview, and the VARK questionnaire (an instrument that measures learning preference) were collected and analyzed along with pre-test and post-test audio speech samples. The visual feedback of the TEAM program and participants` individual learning preferences for a visual mode were found to enhance their self-awareness and self-monitoring of pronunciation. Furthermore, visual feedback and visual preference for learning led to improved pronunciation, native-like quality, and fluency.