DICHORHINIC

Presenting a different odour to each nostril by an olfactometer.

DIETHYLSTILBESTROL

A synthetic compound that does a similar job to estrogen. Used rarely nowdays due to associated health risks.

DIFFERENTIAL REINFORCEMENT

Reinforcing only a selected behaviour.

DIFFUSION

1. The processing of spreading cultural characteristics within a culture or community. 2. Biology. Passive transport. 3. The process wher something is spread out...

DIHYDROINDOLONE

A compound with an indoile nucleus similar to that of serotonin.

DIONYSIAN

Describes a state of mind where it is irrational, disordered, sensuous and maybe drunken or mad. Named after the Greek God Dionysus.

DIRECT MARKETING

Promoting a product direct to the consumer rather than by use of mass media.

DIRECTIONAL HYPOTHESIS

Prediction relating to the direction of experimental scores from one group will differ to another group.

DISABILITY RATING SCALE (DRS)

A scale used to monitor progress during rehabilitation of brain damaged people.

DISCONTINUITY THEORY

Compare to continuity hypothesis. See all-or-none learning hypothesis- eureka task.

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