D

n23

DERIVED NEED

The need that is developed from a primary need.

DESCRIPTIVE AVERAGE

The estimate of the average from only a partial set of data.

DESKILLING

Redesigning a task so it easier to learn and requires less skill to do.

DETAIL PERSPECTIVE

A depth cue related to texture and the details on a surface.

DETOXIFICATION CENTER

The place where detoxification takes place. See alcohol withdrawal- substance withdrawal.

DEVELOPMENTAL MILESTONE

Any aspect of development that is predictable and significant.

DEVELOPMENTAL TEST OF VISUAL-MOTOR INTEGRA

A measure of visuomotor development where the particpant copies increasingly difficult designs.

DFBETAS

Regression analysis. Looks at differences in the beta value in estimating regression coefficients.

DIAGNOSTIC EDUCATIONAL TESTS

Tests that are used to identify any deficiences in academic learning. Also called eduactional tests.

DIANETICS

Controversial technique of therapy that treats all organic mental ills and all inorganic psychosomatic ills with the assurance of complete

DICHORIAL TWINS

Twins with separate chorionic membranes as embyos. Compare monochorial twins.

DIETING

The restriction of food in order to lose weight.

DIFFERENTIAL REINFORCEMENT OF ALTERNATIVE BE

Reinforcing one behaviour by decreasing another.

DIFFUSION MODEL

Model of accuracy and reaction timewhere information is gained continuosly rather than in steps.

DIHYDROMORPHINE

A semi-synthetic opoid used in research of opoid receptors.

DIOPTRICS

Optics. Concerning the refraction of light. Compare catoptrics- dichotic- monotic.

DIRECT ODOR EFFECT

A nervous system change due to an odour in the olfactory tract.

DIRECTIONALITY PROBLEM

A problem with 2 variables where the cause and effect is not known.

DISADVANTAGED

Families and people who are deprived of access to a society's resources and the needs for life. See culturally disadvantaged.

DISCORDANCE

1.The condition of being in variance to a situation. 2. The dissimilarity seen in twins with rrspect to a trait