The extent to which all questions or items assess the same characteristic, skill, or quality.

Internal consistency is a method of estimating reliability that is computed from a single administration of a test. The coefficients reflect the degree to which the items are measuring the same construct and are homogeneous. Cronbach's alpha and the Kuder-Richardson formulas are measures of the internal consistency of a test.

a measure of reliability which reflects the degree to which the various items in a scale tend to measure the same construct. It is considered to be an upper bound estimate of the measure's true reliability (i.e., the true reliability is unlikely to be any higher). It also is easy to obtain but is perceived to be less useful than test-retest reliability measures.

The internal consistency measure of reliability estimates how well the set of items on a test form correlate with one another. This method of reliability is likely to produce higher values for norm-referenced tests than for criterion-referenced tests, given that CRTs are often designed to measure a broad range of content topics.

Psychometric property of an outcome instrument regarding the degree to which individual items are related to each other.

A form of test reliability. Specifically, the homogeneity of a set of items on a test, the degree to which they are all measuring the same variable. See also reliability.

In statistics and research, internal consistency is the coefficient of test scores. Put more simply, internal consistency measures the consistency of results across items within a single test. One example of internal consistency in research might be a test of two questions.