It's a school day morning. You are dressing yourself in the bedroom. At the same time, you are thinking about taking your schoolbag from the living room. But when you walk through your bedroom door and into the living room, you suddenly forget w【1】 you are there and just don't know what to do.Most people would think they have a poor m【2】. But scientists believe that the act of walking through doorways makes them forget things. They call it the doorway effect.The scientists from the University of Notre Dame in the US did an e【3】. They placed several objects into two rooms. The stude