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