What is one of the hallmark features of autism in terms of communication?

One of the hallmark features of autism in terms of communication is delayed or absent verbal communication. Individuals with autism spectrum disorder (ASD) often exhibit challenges in developing effective language skills, which can manifest as delays in speech development or a lack of verbal communication altogether. Some may have limited ability to initiate or maintain conversations, and they might communicate in atypical ways, such as through gestures or alternative forms of communication rather than relying on spoken language.

In contrast, extensive verbal communication is not typically associated with autism. While some individuals with autism may develop advanced language skills, they often struggle with the pragmatics of communication rather than the mechanics of speech. Overly emotional expression does not define autism since emotional expression can vary widely among individuals with the condition, and frequent eye contact is often a challenge for people on the spectrum, as avoiding eye contact can be a common characteristic of autism.