Children may or may not verbalize these fears.
Communication problems-A child with autism may have speech problems, language difficulties, and other communication disorders making it sometimes impossible to verbalize their needs.
The volunteer is asked to verbalize any feelings or sensations which they might experience during the test.
And if he's worth your time, the first thing you ought to do is share with him the note you just sent us (if you can't verbalize it without twisting everything into knots).
And somehow he always managed to say what the majority of the audience were already secretly thinking but could not verbalize.