Large Language Models for Improving Speaking Proficiency in EFL Contexts: A Collocation-Centric Approach
摘要
Collocations, frequently occurring word combinations, are crucial for achieving native-like fluency in English, yet their acquisition remains a significant challenge for EFL (English as a Foreign Language) students. While existing CALL (Computer-assisted language learning) tools address collocation learning and pronunciation practice separately, a critical gap persists in integrated solutions. We introduce ColloSpeak, a GenAI-powered web system designed to bridge this gap by combining collocation learning with pronunciation-focused speaking practice. ColloSpeak offers reliable collocation search outputs, mitigating AI hallucination, and incorporates speech recognition for immediate, personalized feedback on pronunciation. It also facilitates practical speaking exercises based on learned collocations, leveraging a cloud-based speech service and a large language model. An evaluation involving 28 Japanese English learners (beginner to advanced) revealed positive reception of the system in terms of learner fit, meaning-focused learning, and overall experience. Furthermore, an assessment through Chappelle’s CALL task framework confirmed ColloSpeak’s pedagogical soundness. Our findings suggest that AI-based CALL tools like ColloSpeak can significantly enhance collocation-centered language learning and promote second language acquisition in a more efficient and engaging manner.