Author: Glossary
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Nonverbal IQ test
Any of several standard psychometric tests that measure intelligence without the confounding effect posed by differences in speech, reading, and language ability. Such tests include visuospatial tests, pattern recognition tests, and picture-completion tests.
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Nontoxic
Not poisonous or productive of poison. A list of substances considered generally nontoxic is provided in the Appendix. Failure to unite, as a fractured bone that fails to heal completely. Diagnosis of nonunion is established when a minimum of 9 months has elapsed since the injury and the fracture site shows no progressive signs of…
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Nonstochastic effect
A radiation effect whose severity increases in direct proportion to the dose and for which there usually is a threshold. An example is radiation-induced cataracts.
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Nonspecific therapy
The use of injections of foreign proteins or bacterial vaccines in the treatment of infection to stimulate general immunological responses.
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Nonspecific
Inexact, imprecise, not well delimited or defined.
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Nonrestraint
Treatment of the uncooperative without using mechanical restraints.
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Nonresponse bias
Distortion introduced into a research investigation by incomplete collection of data from all possible respondents. This bias is most likely to influence the results of a study when those who do not participate or who refuse to be sampled have other crucial characteristics that the study is designed to identify.
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Nonresponder
An individual who does not achieve an immunological response to a vaccine.
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Nonproprietary name
The name of a drug other than its trademarked (proprietary) name. The nonproprietary name for a new drug is usually the same as that selected by the United States Adopted Name (USAN) Council. The official names for older drugs may differ from the nonproprietary names. In some cases the generic name is the same as…
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Non-progressor
An individual infected with the human immunodeficiency virus who does not develop worsening immune function or symptoms of active disease.