Hallucinations and Paranoia
When someone hallucinates, he sees or hears things no one else does (e.g. kittens walking on the floor). As a rule, if the hallucination is not upsetting, don’t intervene. Delusions are beliefs contrary to fact. Delusions remain persistent despite all evidence to the contrary (e.g. a paranoid delusion is that a nurse in the home took all of your money).
Example: Kate is fearful at night because she sees spiders crawling on her bedroom walls.