Abnormal Perception

Question 1

The tendency to fill in missing information in order to make sense of a stimulus

Answer 1

Completion illusions

Question 2

Arise due to specific mood (affective) states e.g. a woman is walking home in the dark and is frightened, she mistakes a tree for a tall man in a long coat. Another example is an agitated person misinterpreting innocent gestures as threatening

Answer 2

Affect illusions

Question 3

Arise when detailed images are seen from shapes. E.g. seeing the man in the moon, or Jesus Christ on a piece of burnt toast.

Answer 3

Paraideolic illusions

Question 4

A patient experiences an hallucination at the same time as receiving a real stimulus in the same sensory modality

Answer 4

Functional hallucination

Question 5

These are hallucinations beyond the possible sensory field

Answer 5

Extracampine hallucination

Question 6

These occur in one sensory modality in response to a real stimulus in another sensory modality

Answer 6

Reflex hallucination

Question 7

These occur as a patient is waking from sleep (these are normal experiences)

Answer 7

Hypnopompic hallucination

Question 8

These occur as a patient is going to sleep (these are normal experiences)

Answer 8

Hypnagogic hallucination

Question 9

These are visual hallucinations whereby the patient experiences seeing people who appear reduced in size or dwarfed

Answer 9

Lilliputian hallucination

Question 10

These relate to hallucinations of muscle or joint sense. Patient’s may describe that their limbs are being twisted or bent, or their muscles squeezed. They may also described being rocked about

Answer 10

Kinaesthetic hallucination

Question 11

This refers to a person’s experience of seeing a double of themselves in extrapersonal space without the experience of leaving ones body (no disembodiment)

Answer 11

Autoscopic hallucination