Fails to respond to his or her name Resists cuddling and holding, and seems to prefer playing alone Has poor eye contact and lacks facial expression Doesn't speak or has delayed speech or speaks with an abnormal tone or rhythm Repeats words or phrases Doesn't express emotions or feelings and doesn’t understand others Performs repetitive movements May performs self-harming activities Develops specific routines or rituals Coordination problem Unusually sensitivity to light, sound, or touch Makes inappropriate approaches in a social interaction 
Genetics Environmental factors 
Speech and Language Therapist Occupational Therapist Clinical Psychologist Neurologist Psychiatrist Geneticist
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