Unsplash In the University of Notre Dame research, scientists tested participants’ memory when they had and had not moved locations. Good news for people who forget the odd word – some research suggests it’s not a sign of dementia, but rather an ordinary side-effect of ageing. But what about walking into a room with strident purpose, looking around once you enter the door, and thinking, “Wait, why did I come in here”? Documented by the University of Notre Dame in the Quarterly Journal of Experimental Psychology, the confusing experience has been dubbed “The Doorway Effect.” AdvertisementIt might be worse if you’re tired2016 research has found that people who sleep less might experience worse short-term memory.