Glossary N

Norm-referenced grading determining the quality of a pupil's performance by comparing it to the performance of other pupils.

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Norm-referenced test refers to a test that evaluates each individual relative to a normative group.

Normal curve is defined as the bell-shaped curve characterized by a large number of scores in a middle area, tapering to very few extremely high and low scores.

Normal distribution refers to a frequency distribution, defined by a particular mathematical function that is bell shaped, is unimodal, is symmetrical, and has the same mean, median, and mode; a symmetrical, bell-shaped curve that describes the variability of certain characteristics within a population; most people fall at or near the average score, with relatively few at the extremes of the distribution. Normal distribution, moreover, is a frequency distribution in which the values or scores group around a mean. In neuropsychological testing, many test scores display such distributions.

Normal line of regard refers to the line of vision that individuals normally adopt when engaged in a particular task, example is when driving a car

- Normal mood (euthymic mood) : Normal mood (euthymic mood) refers to a feeling state that is neither unduly happy nor sad but shows day-to-day variations within a relatively limited range considered to be appropriate.

Normal science is a term which according to Kuhn refers to the research activities performed by scientists as they explore the implications of a paradigm.

Normal-pressure hydrocephalus (NPH) refers to a neurologic condition which involves ventricular enlargement in the absence of elevated intracranial pressure. Most frequently evident in older adults and characterized by a triad of progressive neurologic signs, such as postural imbalance, Dementia, and urinary incontinence