Ah, after reading over other replies, I think I get the jist of the topic now. Rituals like that... Not reactions.

I used to have a hematite stone that I held and stared at during math tests. It was like my security blanket... But why that rock, you ask? My closest companions during my school years were Noughts and my posessions... These were test-taking sessions, so I couldn't talk to any Noughts, so I just went with telepathically communicating witht he shiniest thing I had. I also sang or hummed roreign songs before, after, and during math tests. No one could ever tell where the tunes were coming from when they heard it; they only assumed it came from the other room.