ENHANCING VOCABULARY LEARNING WITH A.I: THE EFFECTIVENESS OF CHATGPT AMONG THAI PARTICIPANTS AT THONGSOOK COLLEGE

Abstract

This study examines the effectiveness of artificial intelligence (A.I) enhanced vocabulary learning, specifically through ChatGPT, among Thai participants at Thongsook College. As AI becomes increasingly influential in language education, it provides adaptive and interactive methods that support learners in exploring, practicing, and expanding vocabulary knowledge. A total of 190 Thai participants engaged with ChatGPT generated texts and vocabulary tasks over a designated period. To evaluate the impact of this AI-assisted approach, the study employed objective pre- and post-tests to measure vocabulary gains, along with semi-structured interviews to explore learners’ experiences and perceptions. The findings show that 1) Students in the experimental group demonstrated higher vocabulary gains than those in the control group, as shown by significant improvements in pre- and post-test scores. 2) The experimental group reported higher perceived effectiveness, engagement, motivation, and satisfaction (M = 4.27-4.41) compared with the control group (M = 3.52-3.68). 3) Qualitative data indicated that ChatGPT supported deeper learning through context-based explanations, exposure to varied linguistic structures, and personalized feedback. 4) Learners expressed increased confidence and reduced anxiety when using ChatGPT due to its non-judgmental and interactive nature. 5) Challenges were noted, including occasional complex explanations and the need for clearer learner guidance, though these did not significantly reduce overall positive perceptions. Overall, the study demonstrates that ChatGPT is an effective supplementary tool for vocabulary development in higher education. Its interactive features, instant feedback, and adaptive explanations enhance learner motivation, autonomy, and comprehension. These findings support growing evidence for AI-assisted language learning and highlight the importance of integrating AI tools into curriculum design while providing adequate training to maximize learning outcomes.