Denny Borsboom is Professor of Psychological Methods at the University of Amsterdam. His work has focused on conceptual analyses of psychometric models, the measurement problem in psychology, and on substantive psychological research in a number of domains, including intelligence, personality, and psychopathology. Borsboom was one of the early advocates of open science; he coordinated the integration of statistical analyses for the Reproducibility Project Psychology, and was one of the developers of the Transparency and Openness Promotion (TOP) guidelines.