Evidence-based practice emerged in the late 20th century and has become widespread in the 21st century. According to Research and Practice: The Role of Evidence-Based Program Practices in the Youth Mentoring Field (2009) “The concept of Evidence Based Practice (EBP) actually has its roots in the medical field, where the work of Archie Cochrane (1972 ) and others have examined the key role that the large body of medical research and literature could play in how physicians make decisions about patient care” (para 6); Thus, a doctor's decision would be an "informed" decision, based on the evidence collected (patient's symptoms), the history of cases he has supervised or the search for a previous case diagnosed by another doctor, with a related case. Evidence-based practices are defined as “the integration of: (a) clinical expertise/expert opinion, (b) external scientific evidence, and (c) client/patient perspectives /carer to provide high-quality services reflecting the interests, values, needs, and choices of the individuals we serve” (“Evidence Based Practice (EBP)”, 1997-2014); often described as “best practices”. Evidence in itself does not form the basis of decisions made, but it does help support the process of care provided to our clients. Programs, policies and practices are developed for at-risk youth, based on the evidence and research generated by this approach. The basis of this evidence is not to be a deciding factor, as stated above, but to help us identify programs and policies that benefit our youth in positive ways. There is no doubt that the organization of social services will undergo changes, in relation to the people they serve. Hasenfeld (2010) suggests that such sociodemographic changes are the result of immigration and migration, which are in the middle of the article ......t Juvenile justice reform practices. (nd). Retrieved from http://www.princeton.edu/futureofchildren/publications/highlights/18_02_Highlights.pdfEvidence Based Associates. (2004). Retrieved from http://www.evidencebasedassociates.com/about/history.htmlEvidence Based Practice (EBP). (1997-2014). Retrieved from http://www.asha.org/members/ebp/Evidence-Based Programs for Juvenile Justice Reform in Louisiana. (2010). Retrieved from http://www.njjn.org/uploads/digital-library/resource_1650.pdfKauffmann, M. (2010). Integrating evidence-based practices into juvenile justice in North Carolina. Retrieved from http://www.ncchild.org/sites/default/files/Integrating%20Evidence%20Based%20Practices%20into%20Juvenile%20Justice%20in%20NC.pdfResearch and Practice: The Role of Evidence-Based Program Practices in the Youth mentoring area. (2009). Mentoring Resource Center, (30).