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DEWEY, JOHN

US philosopher, educator and psychologist who developed the instrumentalist approach.

DIACETYLMORPHINE

Chemical name for heroine.

DIALECTIC

1. Language. Investigating the truth in ideas through juxtaposition of opposing opinions. 2. Socrates conservational mode of argument. 3. Hegel's

DIAZEPAM

A benzodiazepine used to manage alcohol withdrawal, convulsions and anxiety. Trade name is Valium.

DIDACTIC TEACHING

1. A technique used in therapy where both verbal and written information is given to clients.2. Part of a graduate

DIFFERENTIAL CONDITIONING

Pavlovian experiment where 2 or more stimuli are used where only 1 will produce an outcome.

DIFFERENTIATION THEORY

Theory where perceptionis understood as a filtering process that allows noise to be filtered out while learning to distinguish features

DIGITAL COMPUTER

An electronic device for processing information. Compare analogue computer.

DIMER

Complex where 2 macromolecular sub units are bound together.

DIPLOID

Possessing the correct number of chromosomes, in humans 46. Compare haploid.

DIRECTED FACIAL ACTION STUDIES

Studies where people are asked to move facial muscles to make an emotional expresion without a verbal reference to the

DIRECTOR

Psychodrama. The therapist who establishes the role play and the scenario.

DISCIPLE

1. Student under a teachers direction, supporter or follower. 2. One who spreads the doctrine of another.

DISCREPANCY PRINCIPLE

The assumption that babies are more attentive to unusual stimuli.

DISCRIMINATION

1. Ability to distinguish between stimuli or objects that are different from one another. 2. Ability to respond in different

DISENGAGED FAMILY

A family with memberswithdrawn from each other both emotionally and psychologically.

DISJUNCTIVE TASK

A task or project of a group that is completed when a single solution is adopted by the group. Compare

DISPERSAL

The departure of animals from the birth group.

DISSOCIATED STATE

A reaction to a traumatic event where the person splits up elements of the event so as to deal with

DISTAL STIMULUS

The object that acts or stimulates a sense organ. Also called distal variable. Compare proximal stimulus.