Nicholas Carleton, Ph.D., is a Professor of Clinical Psychology, a registered doctoral clinical psychologist in Saskatchewan. He has published more than 140 peer-reviewed articles, book chapters, and encyclopaedia entries exploring the fundamental bases of anxiety and related disorders. He has completed more than 350 national and international conference presentations. His interests include biopsychosocial assessment and treatment of trauma-related disorders, focusing on lower-order (e.g., intolerance of uncertainty) and higher-order (e.g., extraversion) factors. He enjoys teaching and supervision of undergraduate and graduate students, and maintains a small private practice for military and public safety personnel who have anxiety and related disorders, particularly posttraumatic stress.