Sentence:  Their echolalic responses may be much more extensive than the single words or short phrases that are characteristic of normal <WSD>echolalia</WSD>. Thus, a pseudoverbal autistic child may respond to "Do you want a cookie, Jimmy?" with a replication of the very same words. 
Meaning of the word marked with <WSD> tags:  The immediate, involuntary, and repetitive echoing of words or phrases spoken by another.