The leading text in appraisal for counselors, is a thorough overview covering basic measurement theory and all relevant tests. It provides guidance on how and when to use tests in different environments with different populations, and practical guidance on basic procedures like test selection, administration, and reporting. Key revisions include significant expansion of measurement foundations, separate chapters on validity and reliability as well as a new chapter on "Understanding Test Scores." More case studies have also been added throughout the text to help readers understand how to work with assessments and assessment results.