One bit of information

Sometimes one bit of information makes all the difference in how people respond to something.

My middle son is profoundly autistic.  He doesn't speak, but he laughs and hums and grunts.  He loves to jump and run and spin.  Sometimes I bring him along to my oldest son's Boy Scout troop meetings.

I can ALWAYS tell who knows about his autism and who doesn't.  As he is humming or giggling and spinning and jumping, the people who know look at him warmly and affectionately.  The ones who don't glare and scowl.

Is there one bit of information about your testing that could change the way people respond to it?