| Behavioral characteristics | The child attempts basic attention-seeking or interaction by pulling others’ hands, but shows limited spontaneous social interest or initiation of social interactions. He can follow simple instructions and imitate actions, yet rarely initiates or maintains social behaviors independently. Behaviors seeking sensory stimulation are frequently observed. He often taps on books or specific toys with his fingers or holds and shakes them with both hands, and these behaviors are repetitive and sustained. Additionally he frequently produces unique sensory-stimulating sounds similar to burping while inhaling air.Difficulties are observed in learning activities, and rejecting behaviors such as scratching adults’ arm or neck are frequently observed in response to task demands. These behaviors mainly occur when he is confronted with social demands during learning tasks or daily routines. Escape responses through aggressive behaviors are commonly observed in such situations. When aggressive behaviors such as scratching others fail, he often escalate into outbursts of anger. Such behaviors repeatedly occur in situations involving undesired demands. After aggressive behaviors, emotional reactions such as shouting or crying are frequently observed, especially following negative feedback from adults. |