I am concerned. My 7yr. old seems to be in his own world constantly. He doesn't respond to his name, unless I call it four times. Others ask him a question and he doesn't respond. He has trouble staying on task, focusing and is sensitive to loud noises when concentrating. I can send him downstairs to let the dog out, he finds something of interests, twenty minutes later, still hasn't let the dog out. In a social gathering, seems to be a loner. Does play well with sibling. Does well in school academically, but does his school work slower than most. There is an issue of staying on task at school also. He is a young second grader (July). Keeps occupied with the smallest thing for a long, extended time. Not sure if this behavior is normal, could be personality, or is something wrong?