Glossary N

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.

Nuremberg Code refers to a set of ten (10) guidelines for the ethical treatment of human participants in research. The Nuremberg Code, developed from the Nuremberg Trials in 1947, laid the groundwork for the current ethical standards for medical and psychological research.
Nurse refers to a person trained to care for the sick, aged, or injured.

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