When a teacher gives a test to students on one occasion, repeats the exam on the same students at a later date, and then correlates the scores, the teacher is demonstrating interest in determining which of the following?
A. Face validity
B. Construct validity
C. Test-retest reliability
D. Split-half reliability

The correct answer is option C. Test-retest reliability

Explanation:

Test-retest reliability is a concept when the same test is taken under the same condition over different periods of time by the same individual. The outcome of this test to measure the internal reliability of the test itself.

If the result of the test remains constant throughout multiple testing, it would mean that the test itself is stable and consistent. If the test scores vary over time, it would deem weak and tater the reliability of the test.

do all equestions have to be answered

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.