This Bulletin describes the strength and duration of changeable risk and protective factors for youth violence at points in youth development when they appear most salient. These predictors are potential targets for prevention and intervention. The quantitative results of a large number of studies were synthesized using meta-analysis procedures. The 66 studies all involved juveniles living in the community. The factors identified are grouped into these headings: (1) individual medical and physical factors; (2) individual psychological factors; (3) family factors; (4) school factors; (5) peer-related factors; (6) community and neighborhood factors; and (7) situational factors. Multiple predictors and the strength of prediction are also discussed. Among the school factors explored are academic failure, low bonding to school, truancy and dropping out of school, frequent school transitions, and a school with a high delinquency rate. (Contains 63 references.) (SLD)