Bo Bach, PhD, DMSc, is Clinical Professor in the Department of Psychology, University of Copenhagen, and Head of the Center for Personality Disorder Research in the Psychiatric Research Unit of Region Zealand, Denmark. Dr. Bach serves on the editorial boards of Personality Disorders: Theory, Research, and Treatment and the Journal of Personality Assessment. He received the 2021 Theodore Millon Grant in Personality Psychology from the American Psychological Foundation. Dr. Bach's research interests revolve around new dimensional models of personality dysfunction, maladaptive traits, and related mental health issues, with an emphasis on clinical assessment, differential diagnosis, and treatment planning. He has published over 100 articles and book chapters on these topics.

Christopher J. Hopwood, PhD, is Professor of Personality Psychology at the University of Zurich, Switzerland. Dr. Hopwood is Associate Editor of the Journal of Personality Assessment and the Journal of Psychopathology and Clinical Science, and Editor-in-Chief of the journal Psychology of Human–Animal Intergroup Relations. He is the 2018 recipient of the Theodore Millon Grant in Personality Psychology from the American Psychological Foundation, among other honors. Dr. Hopwood's research interests include personality assessment and development, interpersonal processes, psychopathology, and human–animal relations.

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Erik Simonsen PhD, MD, is Professor Emeritus in the Department of Clinical Medicine, University of Copenhagen, and former Director of the Psychiatric Research Unit of Region Zealand, Denmark. He serves on the editorial boards of the Journal of Personality Disorders and Early Intervention in Psychiatry. With Theodore Millon, Dr. Simonsen cofounded the International Society for the Study of Personality Disorders, for which he served as General-Secretary and later as President. He is a past chair of the Section of Personality Disorders of the World Psychiatric Association. Dr. Simonsen has received numerous international awards and has published more than 400 articles and book chapters, mainly on early detection, psychotherapy, assessment, and classification of first-episode psychosis and personality disorders.

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Robert F. Krueger, PhD, is Distinguished McKnight University Professor in the Department of Psychology at the University of Minnesota. Coeditor of the Journal of Personality Disorders, Dr. Krueger has been named a Clarivate Analytics Highly Cited Researcher, and is ranked by Research.com as one of the top 100 most impactful psychologists in the world. Dr. Krueger is the 2006 recipient of the Theodore Millon Grant in Personality Psychology from the American Psychological Foundation, among other honors. His research interests center on personality and personality disorders, psychopathology, health, aging, and genetics.

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