Which of the following is NOT a type of reliability?

Criterion-related reliability is actually a type of validity rather than a type of reliability. This form of reliability assesses how well one measure predicts an outcome based on another measure, establishing a relationship between the two. It typically involves correlation between two different assessments aimed at evaluating the same construct, which is a key aspect of ensuring validity in measurement.

On the other hand, test-retest reliability evaluates the consistency of a measure over time by administering the same test at two different times and comparing the results. Inter-rater reliability focuses on the degree of agreement among different raters or observers assessing the same phenomenon, while alternate forms reliability examines the consistency of scores on two different forms of the same test, which aim to measure the same ability or characteristic. These three are all types of reliability, demonstrating that they consistently measure what they are intended to measure across different conditions or items.