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DUALIST

Concept of language having 2 levels- phonology and meaning.

DURESS

The threats or acts compelling people to act or speak against their will.

DYNAMIC ASSESSMENT

1. Approach to clinical assessment following the basic principles of dynamic testing. 2. The assessment with a goal of elaborating

DYNAMIC VISUAL DISPLAY

Ergonomics. A visual display designed to show fluctuating information.

DYSFUNCTION

Any disturbance, deficiency or impairment of function or behaviour.

DYSMORPHOPHOBIA

Fear of looking abnormal.

DYSPHRASIA

Older name for dysphasia.

DYSTONIA

An abnormal and involuntary tension or contraction of the muscles resulting in a distorted posture. See extrapyramidal effects.

DECISION THEORY

Theories in social, behavioural and quantitative sciences.

DECONSTRUCTION

Critical analysis. Mainly of literary text where there can be no reference for language and no grounding for truth claims.

DEEP SLEEP

A stage of the sleep cycle where arousal thresholds are high. See also wave sleep.

DEFENSIBLE SPACE

The set of guidelines used to design and plan settings to reduce crime. See territoriality.

DEFUSION

Psychoanalytic theory. Separating instincts that normally operate together. Compare fusion.

DEINDIVIDUATION

An experiential state with a loss of awareness, changed perceptions and atypical behaviour.

DELAYED FEEDBACK

A delay in feedback from the senses that can guide or monitor motor movements.

DELIRIOUS STATE

A clinical state showing features of delirium often from taking drugs, withdrawal from alcohol, hypoxia, head trauma.

DELUSION OF REFERENCE

A false conviction that actions and eventshave a relation to yourself. See idea of reference.

DEMEROL

Trade name for meperidine

DEMYELINATION

Losing the myelin sheath that surronds nerves.

DENSITY-INTENSITY HYPOTHESIS

The explanation of psychological reactions to overcrowding where unpleasant situations are worse and pleasant situations are better.