Interaction Effects Between Learner Characteristics and Dialogue Format in TTS Dialogue-Based Lessons

• URL: http://arxiv.org/abs/2608.20822v1
• Date: Fri, 21 Aug 2026 07:43:50 GMT
• Title: Interaction Effects Between Learner Characteristics and Dialogue Format in TTS Dialogue-Based Lessons
• Abstract summary: This study examined how learner characteristics affect motivation, learning outcomes, and overall evaluation in three types of dialogue-based lessons.<n>Three types of lessons were generated using a large language model (LLM) and Text-to-Speech (TTS) technology.
• Score: 0.8599595236399581
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This study examined how learner characteristics affect motivation, learning outcomes, and overall evaluation in three types of dialogue-based lessons---(1) teacher--student, (2) student--student, and (3) teacher--teacher---generated using a large language model (LLM) and Text-to-Speech (TTS) technology. In particular, we focused on the interaction effects between dialogue format and learners' experiential learning style (the Concrete Experience factor, CE; and the factor of active experimentation through reflective observation and abstract conceptualization, RCE) and critical thinking disposition. Using a repeated-measures design with 222 first-year high school students, we analyzed the data with linear mixed-effects models. The results showed a significant interaction between learner characteristics and dialogue format for ARCS-based motivation. Specifically, the effect of the CE factor on motivation was more strongly positive in the teacher--teacher format than in the teacher--student format, whereas the positive effect of the RCE factor was relatively weaker in the teacher--teacher format. For learning outcomes, the interactions between dialogue format and both the CE and RCE factors showed a trend toward significance. No significant interaction emerged for overall evaluation; however, the overall evaluation of the teacher--teacher format was significantly lower than that of the teacher--student format, a pattern that diverged from the positive effect observed for motivation. These results suggest that dialogue format should be selected according to learner characteristics in TTS dialogue-based lessons. Because the effect sizes of the significant interactions were all small to medium, however, the findings of this study should be regarded as preliminary evidence for the design of personalized learning.

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