The first and only scientifically determined enneagram personality test and guide a centuries-old psychological system with roots in sacred tradition, the enneagram can be an invaluable guide in your journey toward self-...The first and only scientifically determined enneagram personality test and guide a centuries-old psychological system with roots in sacred tradition, the enneagram can be an invaluable guide in your journey toward self-understanding and self-development. In this book, stanford university medical school clinical professor of psychiatry david daniels and counseling psychologist virginia price offer the only scientifically developed enneagram test based upon extensive research combined with a self-discovery and personal-development guide.