Autism is a complex neurodevelopmental disorder that typically appears before age of three years old. The narrower term of autism always refers to classic autistic disorder in the spectrum of pervasive developmental disorder (PDD). In this paper, "autism" and "autistic" are all used to refer to the entire range of autism spectrum disorders (ASD).
/lp/association-for-computing-machinery/early-diagnosis-of-autism-through-analysis-of-pre-speech-vocalizations-XkcDuTpVOg