Glossary N

Nonequivalent control group design refers to a research design in which the researcher does not randomly assign individuals to groups but rather uses pre-existing groups, with one group serving in the treatment condition and another group serving in the control condition. Moreover, Nonequivalent control group design is a quasi-experimental design that uses a control group constituted in a manner different from that of the experimental group.

Nonequivalent group design refers to a research study in which the different groups of participants are formed under circumstances that do not permit the researcher to control the assignment of individuals to groups and the groups of participants are, therefore, considered nonequivalent.

Nonexperiment control group refers to a group of participants used to assess the demand characteristics of an experiment. Each participant is not actually exposed to the levels of the independent variable but is told of the experimental conditions and asked how he/she would respond.

Nonexperimental design is a research design not having protection from the threats to internal validity provided by experimental or quasi-experimental designs. For this reason, the results of such research are impossible to defend.

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Nonexperimental research strategy refers to a research strategy that attempts to demonstrate a relationship between two (2) variables by comparing different groups of scores, but makes little or no attempt to minimize threats to internal validity.

- Nonfluent Aphasia (Broca's Aphasia) : Nonfluent Aphasia (Broca's Aphasia) refers to a condition marked by loss of fluent speech and impaired use and understanding of prepositions, word endings, and other grammatical devices

Nonfunctioning Adenomas are benign neoplasms of the pituitary gland.

Nongonococcal urethritis (NGU) is urethral infection in men which is usually caused by an infection with chlamydia.