In Friedmann et al.’s (2011) “Collaborative Behavioral Management Among Parolees: Drug-Use and Re-Arrest in the Step’n Out Randomized Trial,” the researchers compared the design of Step’n Out randomized collaborative behavioral management (CBM) trial and a standard parole procedure between 2004 and 2008 to identify if CBM has the ability to reduce substance abuse, crime, and re-arrest among parolees involved in drugs. The researchers discovered that the participants in the CBM group had some months in which they used their main drug and alcohol. They determined that CBM had the greatest impact on the parolees who reportedly used marijuana or other non-hard drugs as their main drug. On the other hand, parolees who liked stimulants or
