Karen Smith, Ph.D., has had a clinical practice devoted exclusively to children and their families for the past 13 years. A school counsellor in a public elementary school in Athens, Georgia, she has consulted to Head Start and Early Intervention programs and is an adjunct professor in the Department of Psychology at the University of Georgia. She is the mother of Evan, age 8, and Gemma, age 5.     Karen Gouze, Ph.D., has been the Director of Clinical Psychology Training at Children's Memorial Hospital in Chicago for the past 16 years, where she works in a multi-disciplinary clinic for children with disruptive behaviour disorders. She is currently the co-investigator of a study attempting to identify sensory processing problems in children already diagnosed with disruptive behaviour problems. She is also an assistant professor of psychiatry and behavioural sciences of Northwestern University Medical School. She is the mother of Ben, age 14, and Kate, age 11.