Magic Forums

Scientists have been testing to see whether or not Auras exist. tests have included: placing people (and a magic user) in a darkened room and seeing if they can detect them without light. The other, more common one is seeing if they can detect someone's presence through a Physical barrier (such as a door or large piece of cardboard) My question is: what kinds of things would potentially throw off such an experiment? Or even if testing Magic is possible in any form? (P.S. I am Inexperienced)