Mark D. Terjesen, PhD, is Professor of Psychology and Assistant Chairperson in the Department of Psychology at St. John’s University in Queens, NY, USA. Dr. Terjesen has served as Program Director of the School Psychology (PsyD and MS) programs and has trained and supervised doctoral students throughout his tenure, having mentored over 100 doctoral dissertation research projects. Dr. Terjesen has studied, published, and presented at a number of national and international conferences on topics related to assessment and clinical work with children, adolescents, and families. He has trained many professionals internationally in the use of Rational Emotive Behavior Therapy (REBT) and cognitive-behavioral practices.Dr. Terjesen has served as President of the School Division of the New York State Psychological Association, President of the Trainers of School Psychologists, and is Past President of Division 52 (International Psychology) of the American PsychologicalAssociation of which he is also a fellow. Dr. Terjesen is a Fellow of the Albert Ellis Institute and an approved supervisor.He serves as the Clinical Director at North Coast Psychological Services in Syosset, NY. Dr. Terjesen and his wife, Dr. Carolyn Waldecker, are the proud parents of Amelia Grace who has taught them how to apply the principles of REBT in their role as parents. Kristene A. Doyle, Ph.D., Sc.D. is the Director of the Albert Ellis Institute (AEI). Dr. Doyle is also Director of Clinical Services, founding Director of the Eating Disorders Treatment and Research Center (EDTRC), and a licensed psychologist at AEI. During her 14-year tenure at AEI, Dr. Doyle has held various leadership roles including Associate Executive Director, Training and Development Coordinator, and Director of Child and Family Services. She is also a Diplomate in Rational-Emotive & Cognitive-Behavior Therapy (RE & CBT) and serves on the Diplomate Board. In addition to training and supervising AEI’s fellows and staff therapists, Dr. Doyle conducts numerous workshops and professional trainings throughout the world. With a distinguished international presence, Dr. Doyle has influenced the growth and practice of RE & CBT in countries spanning several continents including South America, Europe, Asia and Africa. Dr. Doyle is co-author of The Practitioner’s Guide to Rational Emotive Behavior Therapy, 3rd edition. She is co-editor of The Journal of Rational-Emotive & Cognitive-Behavior Therapy. She has contributed numerous book chapters on topics such as the treatment of eating disorders, ADHD, and coping with loss. She has presented her research at several national and international conventions, including those of the American Psychological Association (APA), Association for Behavioral and Cognitive Therapies (ABCT), and the World Congress of Behavioral and Cognitive Therapies. In addition, Dr. Doyle has published in numerous scientific journals, some of which include Journal of Social Behavior and Personality and The Journal of Rational-Emotive & Cognitive-Behavior Therapy. In addition to her work at AEI, Dr. Doyle is appointed as Adjunct Professor at St. John’s University in both the Clinical Psychology and School Psychology Doctoral Programs, where she has taught for 14 years.