DEVELOPMENTAL QUOTIENT (DQJ

A division of the chronological age and the developmental age.

DEVIATION IQ

The measure of how far a person difers from the mean by an IQ test.

DIABETIC ENTEROPATHY

A complication of diabetes mellitus marked by fecal incontinence at night. See gastric neuropathy.

DIAGNOSTIC TEST

The examination or assessment used to reveal the source and nature of a problem or anomaly.

DIASTOLIC BLOOD PRESSURE

The pressure of blood flow in a major artery between heart contractions.

DICHOTOMY

Dividing scores into 2 units above and below the median.

DIFFERENTIAL AMPLIFIER

An electrical device that amplifies voltage between 2 input leads.

DIFFERENTIAL VALIDITY

Accuracy and validity of tests of a person's success in different tasks.

DIGIT SPAN

An attention test to see how many numbers a person is able to remember. There is a forward and backward assessment. Forward measures immediate...

DILUTION EFFECT

Animal behaviour. A large group of animals has a better chance of eluding a large animal preying on them than one animal alone. See...

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