To evaluate presence and severity of social impairments in alternating hemiplegia of childhood (AHC) and determine factors that are associated with social impairments.

中文翻译：

---

儿童交替性偏瘫的社交障碍

评估儿童交替性偏瘫 (AHC) 中社会障碍的存在和严重程度，并确定与社会障碍相关的因素。