Option C. The reliability of a measure is always considered first because reliability is a necessary condition for validity. An instrument cannot be valid unless it is reliable.
The reliability of a dimension depends upon the tool used to make the size. range of digits pronounced need to be based totally on the accuracy of the instrument used. The reliability of a sizing device is the quantity to which it yields regular, reproducible estimates of what's assumed to be an underlying actual rating.
Reliability estimates evaluate the stability of measures, internal consistency of size units, and interrater reliability of device scores. Validity is the volume to which the interpretations of the consequences of a check are warranted, which depends on the unique use the test is meant to serve.
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