I don't think I come off as stupid but mostly just awkward and not somebody they want to hang around with when they want to have fun. People who get to know me often tell me I'm very intelligent and talented.
However, I can see why some people would think people with AS are stupid. Like someone else wrote, it's probably a social thing. If I'm asked a question I'm not prepared for then I have a hard time answering. My social situations are controlled enough that I can usually predict what may be discussed and I take a lot of time beforehand to mentally prepare. Trying to appear NT is exhausting. When I go home I often have to take a nap.
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AQ: 42
EQ: 19 SQ: 58 Extreme Systemizing
Your Aspie score: 155 of 200
NT score: 51 of 200
You are very likely an Aspie