If an instrument measures consistently but does not measure what it was designed to measure, the instrument is:
A)valid but not reliable.
B)reliable but not valid.
C)standardized but not reliable.
D)reliable but not normative.

Question

Quizplus · Accepted Answer

Reliability refers to the consistency of a measure, meaning if the instrument yields the same results under consistent conditions, it is considered reliable. Validity, on the other hand, refers to whether the instrument measures what it is supposed to measure. If an instrument measures consistently (reliable) but does not measure what it was designed to measure (not valid), it is reliable but not valid.

If an Instrument Measures Consistently but Does Not Measure What