Mary Main (deceased) was Professor of Psychology Emerita, University of California, Berkeley. She was the co-originator of the Adult Attachment Interview (protocol and scoring and classification system). She also collaborated in the development of many other attachment-related methods including infant disorganized attachment, and frightening/frightened behavior.

Robbie Duschinsky is Professor of Social Science & Health at the University of Cambridge, and a Fellow of Sidney Sussex College, Cambridge. His books includeDevelopments in Attachment Research(2025) andCornerstones of Attachment Research(2020).

Erik Hesse is Adjunct Associate Professor (retired), University of California, Berkeley. He collaborated in the discovery and development of methods related to 'cannot classify' in the Strange Situation, and frightened/frightening parental behavior.

Kate White is a retired attachment-based psychoanalytic psychotherapist, supervisor and member of The Bowlby Centre, London. She is the Editor Emerita of the journal,Attachment: New Directions in Psychotherapy and Relational Psychoanalysis, she is currently the Series Editor of The Bowlby Centre Monographs, published by Routledge. Her publications include co-editing Trauma and Loss; Key Texts from the John Bowlby Archive(Routledge, 2019) with Robbie Duschinsky.

Pehr Granqvist is Professor of Psychology at Stockholm University. His research spans attachment theory across the lifespan, with particular focus on attachment measurement, disorganized attachment, and applications. He has contributed widely to both empirical and theoretical advancements in the field.