Twenty Interviews with Psychometric Society Presidents tells the stories of the people who are the driving forces of psychometric research, teaching and practice. In semi-structured interviews, twenty presidents of the Psychometric Society share how they moved into the psychometric field, what inspired them to pursue this path, and what still drives them to do their research. They also reflect on the current status, history, and future of their own field, considering psychometrics most significant historical achievements, as well as the major challenges that lie ahead. This curated collection provides a wealth of historical knowledge that is relevant for every practicing psychometrician. Introspective and insightful, it exhibits the wide array of opinions and visions in the field. Readers are invited to critically reflect on what holds this diverse field together, and what challenges and opportunities are on the horizon.