The fields of medicine, education, child welfare, mental health, probation and corrections have all been influenced by evidence-based practices. In essence, evidence-based practices are a set of guidelines—based upon rigorous research, evaluations and meta-analysis—that have proved effective in improving decision making and outcomes. In the medical world, for example, evidence-based practice refers to the “conscientious, explicit, and judicious use of current best evidence in making decisions about the care of individual patients.”1 Only recently, however, has this approach spilled over into state courts in the form of providing decision-making tools for judges at the time of criminal sentencing.