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Stefan is a Chartered Psychologist and Associate Fellow of the British Psychological Society. He has 27 years of experience in patient-centered outcome research across a range of clinical and surgical disciplines. Stefan’s main area of interest is in developing, applying, and improving mixed methods psychometric research in clinical studies and therapeutic trials. He is especially interested in maximizing the interpretability of existing and new patient-centered outcome instruments.

Stefan is also a co-developer of Q-Portfolio.