I have been singing for a number of years. AQnd enjoy doing it during chess. Just whatever song is in my head. (I've been told that I have musical terrets.) I have found recently that when singing I have done worse in my games than in those where I was silence, even when they are with the same person or if I had been chatting in the last one. I have also noticed people who join in with me do worse at chess.
I'm not saying singing is the reason for how crap I am at chess but I just feel that is has something to do with lowering concentration even I I wasn't concentrating to start with.
Your thoughts are welcome, please give them.
I wonder myself as you probably are, how serious I am about this theory. The answer is probably not but I needed something to blog about and had already been thinking about this.