This book combines an overview of validity theory, trends in validation practices and a review of standards and guidelines in several international jurisdictions with research synthesis of the validity evidence in different research areas. An overview of theory is both useful and timely, in view of the increased use of tests and measures for decision-making, ranking and policy purposes in large-scale testing, assessment and social indicators and quality of life research. Research synthesis is needed to help us assemble, critically appraise and integrate the overwhelming volume of research on validity in different contexts. Rather than examining whether any given measure is valid, the focus is on a critical appraisal of the kinds of validity evidence reported in the published research literature. The five sources of validity evidence discussed are: content-related, response processes, internal structure, associations with other variables and consequences. The 15 syntheses included here, represent a broad sampling of psychosocial, health, medical and educational research settings, giving us an extensive evidential basis to build upon earlier studies. The book concludes with a meta-synthesis of the 15 syntheses and a discussion of the current thinking of validation practices by leading experts in the field."

The knowledge base in the domains of quality of life, well-being, and subjective well-being is continuing to grow at a rapid rate. In light of this growth, and the interest it reflects on the part of scholars, practitioners, and policy makers internationally, this book will play an important role in bringing scholars and students up to date on diverse topics and promoting and encouraging research in the field of quality-of-life (QOL) studies. Unlike most other similar publications quality of life studies is broadly construed to involve all of the social and health sciences. This volume has much to offer the reader. The papers reflect a diversity of disciplinary and methodological perspectives, it contains material on (a) the monitoring, assessing, and modelling of quality of life, (b) matters of policy, finance, marketing, and business, and (c) papers devoted to the determinants and correlates of well-being and quality of life.

This book combines an overview of validity theory, trends in validation practices and a review of standards and guidelines in several international jurisdictions with research synthesis of the validity evidence in different research areas. An overview of theory is both useful and timely, in view of the increased use of tests and measures for decision-making, ranking and policy purposes in large-scale testing, assessment and social indicators and quality of life research. Research synthesis is needed to help us assemble, critically appraise and integrate the overwhelming volume of research on validity in different contexts. Rather than examining whether any given measure is "valid", the focus is on a critical appraisal of the kinds of validity evidence reported in the published research literature. The five sources of validity evidence discussed are: content-related, response processes, internal structure, associations with other variables and consequences. The 15 syntheses included here, represent a broad sampling of psychosocial, health, medical and educational research settings, giving us an extensive evidential basis to build upon earlier studies. The book concludes with a meta-synthesis of the 15 syntheses and a discussion of the current thinking of validation practices by leading experts in the field.

The knowledge base in the domains of quality of life, well-being, and subjective well-being is continuing to grow at a rapid rate. In light of this growth, and the interest it reflects on the part of scholars, practitioners, and policy makers internationally, this book will play an important role in bringing scholars and students up to date on diverse topics and promoting and encouraging research in the field of quality-of-life (QOL) studies. Unlike most other similar publications quality of life studies is broadly construed to involve all of the social and health sciences. This volume has much to offer the reader. The papers reflect a diversity of disciplinary and methodological perspectives, it contains material on (a) the monitoring, assessing, and modelling of quality of life, (b) matters of policy, finance, marketing, and business, and (c) papers devoted to the determinants and correlates of well-being and quality of life.

*Comprehensive, accessible text, updated: 40% new material includes a new chapter on multilevel IRT models, new material on loglinear models, and more. *Shows how to apply IRT by using common datasets across chapters. *Companion website provides datasets, software links, and additional resources. *Works through the examples using both free and commercially available software programs. *Of particular interest in the U.S., the U.K., Scandinavia, the Netherlands, Germany, China, and Korea.