Validity is a clear, substantive introduction to the two most fundamental aspects of defensible testing practice: understanding
test score meaning and justifying test score use. Driven by evidence-based and consensus-grounded measurement theory, principles,
and terminology, this book addresses the most common questions of applied validation, the quality of test information, and
the usefulness of test results. Concise yet comprehensive, this volume's integrated framework is ideal for graduate courses
on assessment, testing, psychometrics, and research methods as well as for credentialing organizations, licensure and certification
entities, education agencies, and test publishers.