Since its creation more than eighty years ago, the famous Rorschach inkblot test has become an icon of clinical psychology and popular culture. Administered over one million times world-wide each year, the Rorschach is used to assess personality and mental illness across a wide range of circumstances: child custody disputes, educational placement decisions, employment and termination proceedings, parole determinations, and even investigations of child abuse allegations. The test's enormous power shapes the lives of hundreds of thousands of people -- often without their knowledge. In the...