1171).Īt this point, the library doesn’t have staff with expertise to recommend or evaluate tests. Reliability refers to whether or not you get the same answer by using an instrument to measure something more than once. Even if a test is generally considered to be “valid,” it might not be applicable to the particular group, behavior, or situation you are trying to study (Thousand Oaks, CA: Sage Publications, 2004, p. However, as the Sage Encyclopedia also explains, validity not only depends on the instrument itself, but how you use the instrument. Validity and reliability information can sometimes be found in the Mental Measurements Yearbook and other resources listed in this guide. Researchers often discuss the “validity” of tests, rather than whether tests are “good” or “bad.” According to the Sage Encyclopedia of Social Science Research Methods, validity is “the extent to which any measuring instrument measures what it is intended to measure.” Validity is an important indication of whether a test will be useful.
How do you know whether you've found a “good” or “bad” test? Is the test well-designed?
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