"The number of people incarcerated in the United States has increased significantly over the past three decades from approximately 419,000 inmates in 1983 to approximately 1.5 million inmates in 2013. Concerns about both the economic and social consequences of the country's growing reliance on incarceration have led to calls for reforms to the nation's criminal justice system. There have been legislative proposals to implement a risk and needs assessment system in federal prisons. The system would be used to place inmates in rehabilitative programs. Under the proposed system some inmates would be eligible to earn additional time credits for participating in rehabilitative programs that reduce their risk of recidivism. Such credits would allow inmates to be placed on prerelease custody earlier. The proposed system would exclude inmates convicted of certain offenses from being eligible to earn additional time credits. Risk and needs assessment instruments typically consist of a series of items used to collect data on behaviors and attitudes that research indicates are related to the risk of recidivism. Generally, inmates are classified as being high, moderate, or low risk. Assessment instruments are comprised of static and dynamic risk factors. Static risk factors do not change, while dynamic risk factors can either change on their own or be changed through an intervention. In general, research suggests that the most commonly used assessment instruments can, with a moderate level of accuracy, predict who is at risk for violent recidivism. It also suggests that no single instrument is superior to any other when it comes to predictive validity."
CRS Report for Congress, R44087
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html