If a scale is successful in measuring what it is supposed to measure, it is said to be
A)robust
B)generalizable
C)reliable
D)valid

Question

Quizplus · Accepted Answer

Validity refers to the extent to which a measurement tool accurately measures what it is intended to measure. In other words, it measures what it is supposed to measure. Therefore, D is the best choice. Robustness refers to the ability of a scale to withstand errors or disturbances, generalizability refers to the extent to which findings from a study can be applied to other populations or settings, and reliability refers to the consistency of results produced by a measurement tool. While all of these are important aspects of a good measurement tool, validity is the most important factor in determining whether a measurement tool is successful.

If a Scale Is Successful in Measuring What It Is