115 is VERY HIGH NORMAL, so you certainly AREN'T stupid according to that test and, it would have to be like 30% lower before you would be considered ret*d. Although in some ways you may SEEM stupid because of AS. HECK, you may seem like a GENIUS in other areas,
Parents just tend to be stupid. I mean they often feel their kids are not that bright. HERE, there is a commercial where there is a father talking to his daughter in this car telling her how to pull out, what to check, etc.... And here's his daughter, a little 6 year old girl pleading with him, to give her the keys, etc... He then gives her the keys, and a FAR more mature voice says "THANKS DAD", and you see a person ~16!
That illustrates how parents are! Your parents STILL view you like that 6 year old. HEY, my mother still treats ME like that, and I have been on my own for almost 30 years! I am almost 50!
HERE is a writeup on that commercial!
http://www.autoguide.com/auto-news/2010 ... oment.html