Eric Mash is a professor of psychology at the University of Calgary in Canada, where he enjoys teaching undergraduate classes in child psychopathology, behavior modification and developmental psychopathology, as well as graduate classes in clinical psychology, specifically in child psychopathology, child assessment and child psychotherapy. He earned his Ph.D. in clinical psychology at Florida State University and completed his residency in clinical child psychology at Oregon Health and Sciences University in Portland, Oregon. Eric commits much of his time and energy outside the classroom to researching the topics of child psychopathology, child and family assessment, child psychotherapy and child development. Particularly interested in attention-deficit disorder and conduct problems and in families in which children have been physically abused, Eric has contributed and published many journal articles and books on these topics. He is also a Fellow of the American and Canadian Psychological Associations and has served on the editorial boards of many prestigious journals and grant agencies at local and federal levels.