DECEPTION RESEARCH

Used in research where the participants are not told everything about the research. See active deception- double deception- passive deception.

DECLARATIVE MEMORY

Memory that can be recalled in response to remember. Also called declarative knowledge. See explicit memory. Compare non-declarative memory- procedural memory.

DEDUCTION

1. The conclusion arrived at after reasoning processes. 2. Process of deductive reasoning. Compare induction.

DEFECT THEORY

States that people with mental retardation process things differently to those who are not retarded.

DEFICIENCY

A lack or shortage in something.

DEGREES OF FREEDOM PROBLEM

When the brain chooses the best movements to use to solve a problem.

DEJA VECU

Feeling of having lived previously. See false memory.

DELAYED SPEECH

Speech that fails to develop at the expected age and pace.

DELTA RULE

The change in strength of an association is relative to the maximum strength and the current strength.

DEMAND CHARACTERISTICS

Anything that can influence or bias a person's behaviour. See experimenter effect- sensory leakage.

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