With regard to the process of measurement,
A)for measurement to be reliable,it must be valid.
B)for measurement to be valid,it must be reliable.
C)all measurement is both reliable and valid.
D)measurement cannot be both reliable and valid.

Question

Quizplus · Accepted Answer

Validity refers to whether a measurement actually measures what it is supposed to measure, while reliability refers to the consistency of the measurement. A measurement can be reliable but not valid if it consistently measures the wrong thing, but a measurement cannot be valid if it is not consistent (i.e. unreliable). Therefore, for measurement to be valid, it must first be reliable.

With Regard to the Process of Measurement