I've been doing some research regarding requirements for the Psy.D. at various programs around the country. I've discovered that many programs do not require any dissertation. A couple of examples are George Washington University and Rosemead School of Psychology which are both APA approved programs. Even the Psy.D. programs that say they require a "dissertation," have a very loose definition of what constitutes a dissertation. Research projects, literature reviews, and an in depth case study all constitute a "dissertation" in many programs. Since the Psy.D. is supposed to be a practitioner degree and not a scientist/practitioner degree like the Ph.D. in psychology, these schools IMO should drop the pretense of calling these types of requirements "dissertations."