Question

This is used to determine the stability of a test over time:

	A.	parallel-forms reliability
	B.	inter-rater reliability
	C.	test-retest reliability
	D.	internal consistency

Answer 1

Option c) test-retest reliability

Test-retest reliablity measures whether running the same test or experiment will give the same result when performed two or more times, and to ensure that we can rely on such results. This is used when we are measuring something which is expected to remain constant in our sample. This can be used to find out how the current method resists  the factors affecting it when performed at different points of time.

For example: A series of activities are arranged to evaluate the physical strength of the players. When these tests were taken at an interval of a month the results were different at different point of time which means that the test-retest reliability of the activities is low.