Dr. Richard W. Levak has co-authored seven books on the MMPI/MMPI-2 and is a Fellow of the San Diego Psychological Association, the Society for Personality Assessment, and a Diplomate of the American Board of Assessment Psychology.

Dr. Alan F. Friedman is a licensed Clinical Psychologist in full-time independent practice in Chicago, Illinois, USA. He is an Associate Clinical Professor in the Department of Psychiatry and Behavioral Sciences at the Feinberg School of Medicine, Northwestern University, Chicago. He is also a Fellow in the Society for Personality Assessment.

Dr. Yossef S. Ben-Porath is an Emeritus Professor of Psychological Sciences at Kent State University, USA. He has been involved extensively in MMPI research for the past 40 years and is a co-developer of the MMPI-3.