More Information

Mark D. Terjesen

Associate Professor
Ph.D., Hofstra University

Educational Background
Ph.D., 1998, Hofstra University in Clinical and School Psychology

Areas of Specialization

  • Cognitive-Behavioral Assessment and Intervention with Children and Adolescents
  • Clinical Decision Making Factors among School-Based Professionals
  • Single-Case Methodology in School Psychology
  • Behavioral Assessment and Consultation with Educators
  • Supervision and Training in School Psychology

Dr. Terjesen is Associate Professor of Psychology at St. John’s University (Queens, New York), and a core member and program director of the School psychology (PsyD and MS) programs. He earned his Ph. D. in Clinical and School Psychology from Hofstra University. Previously, Dr. Terjesen served as the Chief School Psychologist at Milestone School for Child Development in Brooklyn, New York. He was previously the Child and Family Service Coordinator for the Albert Ellis Institute for Rational Emotive Behavior Therapy in Manhattan, New York and continues to be an active part of the research and training initiatives undertaken at the Ellis Institute. Dr. Terjesen has presented at a number of national and international conferences and has trained professionals in the use of cognitive behavioral practices with children and families.  Dr. Terjesen is very actively involved in the organizational planning of the Association of Behavioral and Cognitive Therapies (ABCT; previously the Association for the Advancement of Behavior Therapy; AABT), first serving as their Institute’s Chair from November 1999 to November 2002 and then as their Continuing Education Chair from November 2002 through November 2005. In addition, he is the Past-President of their Special Interest Group (SIG) for Child and School Related Issues. Dr. Terjesen was President of the School Division of the New York State Psychological Association (NYSPA), the senior organization of school psychologists in the state in 2004, 2011, and 2014. Dr. Terjesen was the recipient of the Academic Division of the New York State Psychological Association Virginia Staudt Sexton Early Career Award for Early Career Contributions to Academic Psychology (May, 2002). Dr. Terjesen served as the President of the Trainers of School Psychologists (TSP), the largest national training organization for school psychology faculty members in 2009. Dr. Terjesen is President of Division 52 (International Psychology) of the American Psychological Association (APA) and serves as Treasurer for Division 16 (School) of the APA. Dr. Terjesen is also an APA Fellow. Dr. Terjesen has studied and published on topics that include matters related to Rational Emotive Behavior Therapy, issues in connection with Cognitive Behavior Therapy, issues associated with the assessment and treatment of ADHD, assessment and treatment of anger with children, investigation into school psychology issues, as well as international psychology. Dr. Terjesen has presently internationally and has co-authored papers or presentations with over 65 different graduate students in his academic career.