Funny you should mention this. Just TODAY I was in a meeting. not long before it's end, I felt like moving my arms. Before I could, I noticed the guy beside me moved his arms the same way. One IMBECILIC IDIOT I knew once said this meant I was racist. Books say it means you are not interested and think little of the opinion. Well, the speaker today was WHITE! I'm WHITE! I guess it wasn't racism! The guy next to me was Indian. He probably thought the signal meant the SAME thing it did for me, and others polled. It probably meant simply that he had to rest his arms.
If the book you point to says otherwise, THROW IT OUT, it is GARBAGE! I will look for it, and check, but I have read LOTS of such books. Either I have polled HUNDREDS of non-NTs, or they are garbage. What do YOU think is more likely?
Steve