Mark was not cuddly as an infant, and when he should have been learning to speak and interact with his classmates in day care, he instead stayed to himself, waving his hands in front of his face for long periods of time. He has never learned to speak and seems indifferent to other people. He becomes very distressed if anyone moves objects around in his room. Mark most likely has __________.

Question

Quizplus · Accepted Answer

Mark's symptoms, such as lack of social interaction, delayed language development, and obsessive behavior around objects, are consistent with Autism Spectrum Disorder. Mental retardation would not necessarily explain all of his symptoms, and attention deficit/hyperactivity disorder would involve different behaviors. Childhood schizophrenia is a possibility but would typically involve different symptoms, such as delusions and hallucinations.

Mark Was Not Cuddly as an Infant, and When He