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Mental Measurements Yearbook & Tests In Print: RELIABILITY/VALIDITY

Professional reviews of commercially available tests and information on what the tests cover and how to purchase them.


What is the difference between reliability and validity?

Reliability and Validity

Reliability and validity are essential to measurements   While high reliability does not warrant validity, a study cannot achieve validity without reliability.

  • Reliability is the consistency of your measurement, or the degree to which an instrument measures the same way each time it is used under the same condition with the same subjects and the testing procedure is free from random errors of measurement.
  • Validity is how close what is being measured on the paper is to what we intend to measure in our theory. It eventually leads to how close our conclusion based on the measurement results are to the truth.

If you don't find reliability and validity in Mental Measurements Yearbook test review,, search for journal articles which may include them.

  • Do a search in  PsycInfo.
  • Add the terms "Reliability" or "Validity" to the search. Example: In the Find box, type slosson intelligence and validity

Subject Guide

Judy Nixon's picture
Judy Nixon
HSSE Library 253
Stewart Center