Which of the following may generally be assumed to be true about reliability and validity?
A)A test can be valid but unreliable.
B)A test can be reliable but invalid.
C)A reliable test must be valid.
D)A test cannot be unreliable and invalid.

Question

Quizplus · Accepted Answer

A test can be reliable but invalid if it consistently measures the wrong thing. For example, a thermometer may consistently give the same temperature reading (reliable) but be calibrated incorrectly and therefore not actually measure the correct temperature (invalid). Similarly, a test can be valid but unreliable if it measures what it is supposed to, but the scores are inconsistent. For example, a personality test may accurately measure a person's extraversion, but if the scores are different each time the test is taken, it is unreliable. It is possible for a test to be both unreliable and invalid, but it is not necessary for a test to be either reliable or invalid in order to be the other.

Which of the Following May Generally Be Assumed to Be