Category: D
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Differentialist
Theory of career planning.
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Differential intervention planning
The planning of the appropriate form of treatment for a distinct disorder.
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Difference tone
A third tone sometimes heard when tones of two widely different frequencies are sounded together, beat; summation tone.
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Difference threshold
The amount by which a given stimulus must be increased or decreased so that the person can perceive a just noticeable difference (JND).
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Differences (method of)
In research, a situation in which a phenomenon occurs and one in which it does not occur are exactly alike except for one circumstance in the former. The circumstance in which they differ is presumed to be causally related to the phenomenon.
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Difference model
The theory that a retarded person’s learning difficulties result from a cognitive defect, and therefore, the learning processes them selves are qualitatively different from those of normal people.
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Diethylstilbestrol (DES)
An ingredient in post-coital or morning after contraceptive pill during the 1960s. It is also a chemical used to treat menopausal symptoms on women and prostate gland cancer in men was also used to prevent miscarriages in women. In 1971, scientists noticed that daughters born to women who took to prevent miscarriage had a greater…
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Diethylpropion
An amphetamine-like appetite suppressant. A drug, similar to amphetamine, that suppresses the appetite and is used in the treatment of obesity. It is administered by mouth and may cause dry mouth, insomnia, depression, headache, constipation, and allergic rashes. Dependence of the amphetamine type can occur.
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Dietary recall
A technique of dietary evaluation in which subjects are asked for specific details of their diets during the preceding 24 h.
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Dietary goals for the united states
In 1977, the Senate Select Committee on Nutrition and Human Needs released its report recommending that American society strive to meet dietary goals in the areas of carbohydrates, sugar, fat, protein, cholesterol, and salt intake. While revised by various organizations and agencies in the intervening years, these goals established a benchmark for the improvement of…