"Psychologists Markus and Borsboom have done an excellent job of arguing that validity theory is in serious need of more research. For those in the behavioral sciences who are already well versed in the assessment, this book will provide an invaluable source for understanding why they might want to revisit many of the fundamental assumptions of their field. For less experienced readers, the book may be a steep climb but well worth the effort when taken one step at a time. Summing Up: Highly Recommended. Graduate students, faculty, researchers, professionals." – J.F. Heberle, Albright College, CHOICE Magazine
“It is a formidable achievement to write a book on validity, covering measurement, causation, and meaning, with a discussion from psychometric, philosophical, and practical perspectives. It is why one would want to read this book. It leads to a deep understanding and makes one think beyond common ways of thinking." – Paul De Boeck, Ohio State University, USA & KU Leuven, Belgium
"This book would serve as a seminal resource on validity. It challenges practitioners and the field ... to reflect [on] and identify the salient evidence of one of the most important characteristics that we require of all tests." – Terry Ackerman, University of North Carolina at Greensboro, USA
"The book will make a very valuable contribution to the field by bringing much of its (often ignored) theoretical underpinnings to light in a…straightforward manner.…[It] will be of great interest to measurement and psychometric researchers, as well as to philosophers of statistics.…It gives important insight into a variety of issues." – Brian Habing, University of South Carolina, USA
"The authors are raising thought-provoking questions about the nature of measurement, causality, and validity.…Markus and Borsboom are raising the bar for what it means to be called a validity theorist." - Derek Briggs, University of Colorado, Boulder, USA
“This book provides a unique contribution to the topic of test validity. It is an interesting interdisciplinary approach combining elements of philosophy, social sciences, and math. I found as I was reading that I was forced to think differently about several concepts. I am not aware of any book like this.” – Jean Powell Kirnan, The College of New Jersey, USA
