From the Introduction: "The purpose of contemporary, structured mentoring programs is to reduce the potential risk of negative outcomes by supplementing (but not supplanting) a youth's relationship with his or her parents. These programs are administered primarily by adult volunteers who are recruited by youth-serving organizations, faith-based organizations, schools, and after-school programs. Some of these programs have broad youth development goals, while others focus more narrowly on a particular outcome such as reducing gang activity or substance abuse, or improving grades. Research has shown that mentoring programs have been associated with some positive youth outcomes, but that the long-term ability of mentoring to produce particular outcomes and the ability for mentored youth to sustain gains over time are less certain."
CRS Report for Congress, RL34306
Congressional Research Service: https://crsreports.congress.gov/