Psychologist Donald Dutton is a pioneer in the study and treatment of abusive men. He is a psychology professor at the University of British Columbia, and the director of the Assaultive Husbands Program in Vancouver, Canada. Recently Dutton was an expert witness for the prosecution in the pretrial of O.J. Simpson. His new book (co-authored with Susan Golant) is The Batterer: A Psychological Profile (Basic Books). (THIS INTERVIEW CONTINUES through THE HALF HOUR).