Autistics laughed just as much as nonautistics. The sole difference between autistic and nonautistic laughs was in proportion of voiced laughs. While on average, 97% of autistic children's "laugh episodes" were voiced, only 63% and 47% (age-equivalent and chronological age groups respectively) of nonautistic children's laughs were voiced. And about half the autistic children produced only voiced laughs.
...children with autism routinely produce fewer types of laughs than typically developing children because their laughter is more closely linked to their internal experience of positive affect
这就是我所说的自闭症孩子的典型的笑的方式,在这个视频很明显