<qa>  What is the efficacy trial of peer mentoring?This study will conduct an efficacy trial of peer mentoring for a high-risk, predominantly minority population of 9- to 15-year-old youths whose parents are HIV infected. The study will also determine mechanisms mediating variables through which peer mentoring improves outcomes for the mentees, for example, consistency and continuity of relationship, teachingrole modeling, emotional supportempathy, advocacy, and behavioral reinforcement. After the conclusion of the efficacy trial, the study will continue through naturalistic longitudinal research for an additional 2 years in order to examine the long-term outcomes of peer mentoring. 