Paranoia is a common symptom of dementia, and it’s one of the hardest to deal with. Though there isn’t a definitive stage of dementia when paranoia appears, it’s most often observed in the later ...

Folie à deux is a condition whereby one person's delusion becomes believed by one or more others. For example, one person in a couple believes an ex-lover is stalking them. Eventually, they tell their ...

Delusions (or strongly held false beliefs) are a common symptom for a person with dementia. They can take the form of paranoia, which makes the person feel threatened, even if there is no or little ...

Some peculiarities of the delusional state (The patients described below have been disguised.) In a way, everything about the delusional state is peculiar. An affected person (usually a paranoid ...

People who see meaning where there is none, like imagining one dot chasing another, may be showing early signs of paranoia or psychosis. Yale scientists found that such visual misperceptions are tied ...

Forbes contributors publish independent expert analyses and insights. Dr. Lance B. Eliot is a world-renowned AI scientist and consultant. In today’s column, I examine the disturbing aspect that ...