Schizophrenia
Schizophrenia affects one person in a hundred at some point in their lives. The illness usually starts in the late teens or early twenties, and alters the sufferer's experience and interpretation of the world. This may lead to delusions - strongly held false beliefs. Experience of hallucinations (particularly hearing voices) is a common experience, but incoherent thoughts, personality change, absence of emotion and depression can occur as well.
