Katerina Maniadaki is a professor of developmental psychopathology and the head of the Department of Social Work at the Athens University of Applied Sciences. She has a Bachelor’s in psychology, a Master’s in developmental psychology, and a PhD in developmental psychopathology. Since 1996, she has been working as a clinical child psychologist. Her interests focus on developmental psychopathology, mainly ADHD. She has published scientific books, edited collections, book chapters, and papers. She is the coordinator of numerous training programs on ADHD. Her contribution in scientific research has been recognized with the Universum Donna 2016 award from the international organization Universum Academy Switzerland. Efthymios Kakouros is a professor of developmental psychopathology and the head of the Department of Early Childhood Education at the Athens University of Applied Sciences. He has been working as a psychologist in child mental health services since 1983. His interests include mainly childhood developmental disorders. In 1990, he founded the Psychological Center of Developmental and Learning Disabilities "ARSI", and he has been its scientific director since then. He has published scientific books, edited collections, book chapters and papers. He has presented more than 150 papers in conferences and he has been an invited lecturer in many training programs for professionals.