This book provides a comprehensive overview of behavioral interventions to prevent HIV-AIDS risk-related behaviors. It synthesizes the empirical literature on individual, group, and community-level interventions and provides an objective and detailed assessment of intervention outcomes. Factors associated with behavioral risk for HIV transmission, theories of HIV risk behavior change, and the state of HIV prevention technology transfer are also reviewed. Additionally, behavioral interventions for adolescents and adults of diverse ethnic and sexual backgrounds are discussed with respect to each intervention type. Although the focus is on sexual risk reduction, interventions for sexual behavior of substance abusing populations are also covered.