인공와우이식 영유아와 어머니 간 발성 차례주고받기에서의 시간적 반응양상

Abstract

Background and Objectives This study investigated the temporal characteristics of vocal turn-taking between hearing mothers and their toddlers with cochlear implants (CIs) and ex- amined the relationship between vocal turn-taking patterns and language development. Subjects and Method Participants included 10 mother-toddler dyads with CIs and 12 dyads with typical hearing (TH). A 20-minute free-play interaction was recorded using a digital re- corder. Temporal properties of vocal turn-taking were analyzed using the Praat software, fo- cusing on speaker vocalization duration, the proportion of coordinated vocal interactions, the duration of vocal turn-taking sequences, and inter-speaker switching pauses. Results No significant differences were found in speaker vocalization duration in mothers or toddlers between the CI and TH groups. However, toddlers with TH engaged in a signifi- cantly higher proportion of coordinated vocal interactions with their mothers than toddlers with CIs. The duration of vocal turn-taking sequences and inter-speaker switching pauses did not differ significantly between the two groups. Notably, in the CI group, a higher proportion of coordinated vocal interactions was significantly associated with better language scores. Conclusion These findings indicate that while the overall temporal properties of vocaliza- tions and turn-taking sequences are comparable between toddlers with CIs and those with TH, coordinated vocal interactions occur more frequently in the TH group. The significant as- sociation between coordinated vocal interactions and language development in toddlers with CIs underscores the need for targeted strategies to enhance these interactions and support lan-guage acquisition.