"[Introduction to Psychometric Theory] does a good job of ‘mentoring’ you from study design all the way to analysing and interpreting your data. ... The book easily passes the ‘Did I wish I had used this book during my PhD?’ test, and some of the more advanced chapters have dropped several pennies for me." – Chris Beeley in The Psychologist"Introduction focuses on measurement of unobserved constructs and builds on latent variable modeling to produce a refreshingly new and integrative presentation of psychometric theory. Indeed, the latent variable approach serves well to integrate classical test theory, generalizability theory, and item response theory. It is a must read (if textbooks can be so described!) for scholars as well as students of psychometric theory and practice." - Richard J. Shavelson, Stanford University, USA"The market is … begging for this book…The existing texts are either too dated [or] too inaccessible ... The authors …. capture critical intellectual developments of the last decade … they effectively exploit computational advances to put all of this in an applied context, thereby grounding the material in real world examples. The quality of the scholarship … is simply first-rate.… The coverage is right on…The writing is superb and accessible.…. The ability to work through each example using the authors’ datasets is invaluable …I would … adopt this text and use it to reinvigorate my own course. It promises to provide a great opportunity to refresh the way we teach this material." – Scott L. Thomas, Claremont Graduate University, USA"This text will make a unique and important contribution to the field. It is extremely well-written. … An excellent text for a … course in psychometric theory. … The references are current, reflecting the most recent work in classical test theory. The software applications … are a unique and powerful asset." - Jennifer Rose, Wesleyan University, USA"I … congratulate the authors on tackling the complex area of psychometric theory … so well and putting so much effort into making … their book … accessible to a wide audience. … I … would certainly adopt this book … [for] a graduate-level course … in educational and psychological measurement. … One of the strengths … is the provision of code in the text as well as … data files and codes on the website. … What makes the book most unique is the unified treatment of multiple latent-variable methods." - André A. Rupp, University of Maryland, USA„ It was very easy to read ... anyone would be able to read this and understand [it]... the examples were very useful. ... Most [competing] books have not been revised or can be challenging... the strength of this book is its breadth." – Robert Henson, The University of North Carolina at Greensboro, USA