false sensory perception in the absence of a real external stimulus It is perceived as being located in objective space and as having the same realistic qualities as normal perceptions It is not subject to conscious manipulation and only indicates a psychotic disturbance when there is also impaired reality testing
A situation whereby a person experiences a sensory perception but there is no external stimulus It can be associated with any of the senses but most often it is visual
Perception of objects or experience of sensations with no real external cause Can be auditory, visual, etc
False or distorted perception of an image or sound with a compelling sense of reality
an object perceived during a hallucinatory episode; "he refused to believe that the angel was a hallucination" illusory perception; a common symptom of severe mental disorder
An internal representation of, or about, the world that has no basis in present sensory experience