The main goal of our study is to find out why some people with Autism Spectrum Disorder (ASD) do not develop verbal abilities or remain minimally-verbal throughout adolescence and adulthood. Current research focuses on investigating brain differences related to processing sounds and initiating speech in adolescents and young adults with ASD varying in language skills, compared to adolescents who do not have ASD, in order to clarify whether atypical processes of auditory perception, perceptual organization and/or neural oscillation patterns may explain why some individuals with ASD fail to acquire functional speech.