People with cognitive impairment disorders are often described as living in the past. Their short-term memory is usually the first to deteriorate, while more distant memories are less affected. As a result, they often try to resume their past duties by following their past memories and habits, such as going out to work at a certain time, drinking tea, picking up their children from school, going out to buy food, etc., or remembering where they used to live decades ago, which makes it difficult for them to find their way back home.