Nonverbal autism is a subset of autism spectrum disorder (ASD) where the person does not learn how to speak. It is estimated that 25% to 50% of children diagnosed with ASD never develop spoken language beyond a few words or utterances. Nonverbal autism can also manifest in other ways, such as through limited eye contact, poor nonverbal communication skills, and difficulties with social interaction. It is important to note that nonverbal autism is not an actual diagnosis, but rather a term used for a subgroup of people with ASD who never learn to speak. Children generally exhibit symptoms of autism in the first two years of life. There are no conclusive findings on why some individuals on the autism spectrum develop nonverbal autism, and this is an area within the autism spectrum that needs more research. However, it is important to note that their lack of verbal communication is not due to a lack of intelligence. Some strategies that can be used to help nonverbal autistic children better communicate include using visual aids, sign language, and augmentative and alternative communication (AAC) devices.