The Mental Measurements Yearbook (MMY) provides reviews of commercially available tests to help with informed test selection. Each review includes descriptive information and one or two critical reviews by professionals. The MMY is organized alphabetically with indexes for easy searching. Tests in Print serves as a comprehensive bibliography for commercially available tests and guides readers to candid reviews in the MMY. Both validity and reliability are important factors for any test, with validity determining if a test measures what it is intended to measure and reliability ensuring consistent results under the same circumstances.