视听协同发展在婴儿期语言习得中的作用：典型发育与高风险自闭症谱系障碍婴儿的比较分析

Multimodal sensory mechanisms are critical for language acquisition in infancy. Audiovisual integration, in particular, plays a pivotal role in developing linguistic skills among typically developing infants. In contrast, infants at high risk for autism spectrum disorder (ASD) often encounter significant challenges in this integration process. Typical developmental trajectories of speech perception emphasize the importance of processing facial features. Specifically, attention to the eye and mouth regions facilitates language learning. Empirical evidence shows infants as young as 4.5 months demonstrate audiovisual integration abilities. These early abilities reliably predict later language development outcomes. In contrast, infants at high risk for ASD show reduced social attention and impaired audiovisual integration. Such deficits may disrupt typical language acquisition pathways. Therefore, early intervention strategies should prioritize biologically-informed, sensory-guided approaches. These approaches should focus on enhancing multisensory integration rather than exclusively targeting attentional behaviors. Understanding these mechanisms advances our knowledge of typical language development. Moreover, it provides empirical foundations for creating targeted early interventions to support language acquisition in high-risk ASD populations