This study explored how adult speakers mediate triadic interactions involving young children and generative AI (GPT), focusing on discourse strategies and meaning negotiation. Four five-year-old children and their primary caregivers, acting as adult interlocutors, participated in structured GPT-based sessions. The adults actively interpreted, reformulated, and scaffoldedﾠthe children's utterances and the GPT's responses. Through inductive transcript analysis, nine caregiver strategies were identified and categorized into three functional domains: information adjustment (e.g., summarizing, rephrasing), meaning expansion (e.g., repetition, interpretation), and discourse organization (e.g., scaffolding, framing). These strategies shaped interactional flow and enabled meaningful participation by the children. Rather than functioning as a neutral tool, GPT acted as a quasi-participant whose outputs required adult mediation to be developmentally appropriate. The findings position adult speakers as co-constructors of meaning, aligning with Vygotsky's zone of proximal development, Bruner's language acquisition support system, and Gumperz's contextualization theory. This study underscores the socially situated nature of child-AI interaction and argues that the developmental value of generative AI depends not on its autonomous functionality but on the interpretive work of responsive adults. The findings hold implications for designing AI-mediated educational discourse and enhancing language socialization in early childhood.

Abstract
1. 서론
    1.1. 연구 배경 및 필요성
    1.2. 연구 목적 및 연구 질문
    1.3. 연구 대상
2. 이론적 배경
    2.1. 근접발달영역과 유아–GPT 상호작용의 발달적 구조화
    2.2. 언어 습득 지원 체계와 GPT 기반 담화의 구조 설계
    2.3. 맥락화 개념과 GPT 담화의 해석 가능성 설계
3. 연구 방법
    3.1. 연구 설계
    3.2. 연구 참여자 및 자료 수집
    3.3. 자료 구성 및 처리
    3.4. 분석 방법
4. 연구 결과
    4.1. 정보 조정 전략
    4.2. 의미 확장 전략
    4.3. 담화 조직 전략
    4.4. 소결: 언어 전략과 의미 협상의 흐름
5. 결론 및 논의
참고문헌

• 정지은(Ph.D. Candidate, Interdisciplinary Program in Korean Studies, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul, 03722, Republic of Korea) | Jieun Jung