"This book, focusing on the validation of score meaning using response process, introduces a unique dimension to the validation of assessments. It is a must-read source for anyone who is involved in assessment development and use. Currently, the field of assessment is mainly focused on content and psychometrics aspects in assessment validation; therefore, the internationally respected scholars who wrote the chapters of this volume have made a timely contribution to the assessment field by highlighting the importance of validity evidence based on response process."--Jamal Abedi, Professor, School of Education, University of California, Davis, USA"Ercikan and Pellegrino have provided a thorough investigation of how the test-taker response processes influence the validity of score interpretations. By including studies that incorporate new technology with those using more traditional methods, assessment developers can better understand best practices in validity research. This highly readable book offers information that applies to multiple assessment types and purposes."--Marianne Perie, Director, Center for Assessment and Accountability Research and Design, USA"This volume and its approach to test validation represent an exciting addition to the field. Using examinee responses as a part of test validation will help those of us concerned about bias and fairness in testing."--Martha Thurlow, Director, National Center on Educational Outcomes, USA""With its clear organization, theoretical, and practical contributions to the topic, and the inclusion of a variety ofassessment types, the book can be considered an effective starting point for assessment researchers and practitioners who consider using response process data in their validation studies."--Journal of Educational Measurement, Vol. 57, No. 1