The 78th Annual International Meeting of the Psychometric Society (IMPS) built on the Psychometric Society's mission to share quantitative methods relevant to psychology. The chapters of this volume present cutting-edge work in the field. Topics include studies of item response theory, computerized adaptive testing, cognitive diagnostic modeling and psychological scaling. Additional psychometric topics relate to structural equation modeling, factor analysis, causal modeling, mediation, missing data methods and longitudinal data analysis, among others. The papers in this volume will be especially useful for researchers (graduate students and other quantitative researchers) in the social sciences who use quantitative methods, particularly psychologists. Prior knowledge of statistical methods is recommended for the best use of this volume. The conference took place in Arnhem, The Netherlands between July 22nd and 26th, 2013. This is the second volume to showcase the Psychometric Society Meeting. The first is New Developments in Quantitative Psychology: Presentations from the 77th Annual Psychometric Society Meeting (Springer, 2014).