Glossary

Perception of an image such as people (formed) or a flash of light (unformed). Previously thought to have been uncommon in schizophrenia, but now found to be prevalent in high numbers in subjects with chronic schizophrenia. Also occur in people with visual system disease (eg, macular degeneration) unrelated to primary psychiatric disorder. Common with substance induced psychosis.

Fluent or having a ready flow of speech.