I would want to get them moving past "attention" as a concept. For example one category from above would be identifying when the cognitive demands of motor planning related to his disability interfere with his ability to remember a request or to instantly respond to a question.

And identifying appropriate daydreaming rather than inability to pay attention as a form of mental compacting. If someone is reading already known or irrelevant information, then thinking about something else seems an entirely healthy coping mechanism to me.