A delusion is a fixed, relatively immutable, persistent, false belief with no basis in reality. Source: Piotr Marcinski/Shutterstock We talk often about "deluded" people: “The person on the talent ...

Delusions are a symptom of psychosis. They involve strong beliefs in something that is not true. Certain mental health conditions, such as schizophrenia and delusional disorder, often involve ...

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 ...