AP PSYCHOLOGY

Detailed explanation-1: -Test-retest reliability is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals. The scores from Time 1 and Time 2 can then be correlated in order to evaluate the test for stability over time.

Detailed explanation-2: -This correlation is known as the test-retest-reliability coefficient, or the coefficient of stability. The closer each respondent’s scores are on T1 and T2, the more reliable the test measure (and the higher the coefficient of stability will be).

Detailed explanation-3: -Test-retest reliability measures the consistency of results when you repeat the same test on the same sample at a different point in time. You use it when you are measuring something that you expect to stay constant in your sample.

Detailed explanation-4: -Test-retest reliability is commonly estimated by calculating the correlation coefficient of the measured values at two separate time points. A higher correlation between the values of the two test occasions indicates greater temporal stability or test-retest reliability.

Detailed explanation-5: -Reliability refers to how dependably or consistently a test measures a characteristic. If a person takes the test again, will he or she get a similar test score, or a much different score? A test that yields similar scores for a person who repeats the test is said to measure a characteristic reliably.