* Narrow interests or preoccupation with a subject to the exclusion of other activities
* Repetitive behaviors or rituals
* Peculiarities in speech and language
* Extensive logical/technical patterns of thought
* Socially and emotionally inappropriate behavior and interpersonal interaction
* Problems with nonverbal communication
* Clumsy and uncoordinated motor movements (in many cases, this only affects gross motor skills, not fine motor skills)
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