Dr. Cook-Greuter (EdD Harvard) is one of the pioneers of adult development. After 4 decades of research, training and teaching Ego Development Theory (EDT) and its application to leadership development and coaching, she is now focusing on mentoring researchers, practitioners, startups, and writing. 

 

She has contributed significantly to the fields of adult development and leadership maturity, including refining and expanding Loevinger’s EDT to include post-autonomous ego stages, adding a deep linguistic perspective and clearer structure-content distinctions, and systematising the practical application of EDT based on her Integral Sentence Completion Test (SCTi), later renamed to Maturity Assessment for Professionals (MAP). Since 1980, Dr. Cook-Greuter has analysed more than 11,000 MAP assessments in more than 200 different academic and business contexts. Her theory and assessment instrument are the backbone of the LeadershipMaturity.ai framework. 

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She resides in New England, the USA, with her family. She relishes her time spent with her partner, children and grandchildren. Currently, she is writing a book on ego development theory from a perspective that includes an appreciation of non-WEIRD definitions of what it means to be a person in Indigenous cultures. She hopes to contribute even more to the Inner Development Goals (IDGs), a subset of the UN's Sustainable development goals (SDGs), and to the Human Flourishing Research project at Harvard.