Glossary N

- Nucleus of the tractus solitarius (NTS) : Nucleus of the tractus solitarius (NTS) is the area in the medulla that receives input from taste receptors
- Nucleus reticularis thalami (NRT) : Nucleus reticularis thalami (NRT) is a group of neurons within the thalamus that regulates oscillatory behavior of the thalamocortical loop.
Null contingency refers to a reinforcement contingency in which there is no relation between a response and reinforcing stimuli

Null hypothesis the hypothesis alternative to a primary hypothesis, stating that there is no relationship between the independent variable and the dependent variable. In a hypothesis test , Null hypothesis is a statement about the population(s) or treatments being studied that says there is no change, no effect, no difference, or no relationship.
Null results refer to an experimental outcome in which the dependent variable is not influenced by the independent variable
Null-subject parameter refers to a grammatical feature that specifies whether a language permits sentences without subjects. Null-subject parameter is also called the Pro-drop parameter.

Numerical summarization the use of numbers to describe performance on an assessment.
Numerosity is defined as the ability to determine quickly the number of items in a set without counting.

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