Astudent takes the scholastic aptitude test (sat) as a requirement to get into college. her score on the test is 600. three weeks later, she is asked to take the identical test again. this time she scores 500. this inconsistency in scores is an issue of:

Test-retest reliability

Explanation:

Test-retest reliability is a statistical phenomenon. It is also called retest reliability. It measures the test consistency and the reliability of the test measured over time. The test is administered at the same people twice but at different times to measure if the score is the same or not. Suppose a test administered on Monday then again administered Monday and then correlated both the test if the result is the same then the test is reliable and if not then the test is not reliable.  

There are the different coefficient of the test :

Test-retest reliability

Explanation:

The test retest reliability is referred to as or known as the measure of the reliability that is obtained by reviewing and administering same test two times over a time period to the group of the individuals. These scores that are obtained from the Test 1 and Test 2 can be further correlated so as to evaluate test for the stability over period of time.  

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