Sociometric measures were used to predict peer helpfulness of youth in a residential treatment center. Seventeen female adolescents with conduct disorders were asked to choose three peers in their group who were most popular, similar, well-liked, and competent. These sociometric measures were correlated with the frequency in which each peer was nominated as most and least helpful in several problem scenarios representing actual situations encountered in residential settings. A multiple linear regression analysis indicated that "popularity" was the best predictor of peer helpfulness across the problem scenarios. Discussion focused on the impact of popularity on treatment strategies for youth in residential placement.Peer mediated interventions have been effective in treating a variety of problems including social withdrawal (Ragland, Keer, & Strain, 1981; Saintato, Maheady, & Shook, 1986;Strain, 1977;Strain, 1981; Strain, Shores, & Timm, 1977), disruptive classroom behaviors (Carden-Smith & Fowler, 1984;Fowler, Dougherty, Kirby, & Kohler, 1986;Ringer, 1973), and improving the social skills of students with severe handicaps (Blew, Schwartz, & Luce, 1985; Donder & Nietupski, 198 1; Drabman & Spitalnik, 1973;Hendrickson, Strain, Tremblay, & Shores, 1982;Lancioni, 1982; Sasso, Houghes, Swanson, & Novak, 1987;Sisson, Van Hasselt, Hersen, & Strain, 1985;Strain, Kerr, & Ragland, 1979).A number of studies have found that using "high status" peers can enhance treatment effects with peer mediated interventions. For example, Sasso and Rude (1987) found that popular peers were more influential in producing higher rates of initiations towards students with handicaps than were "low status" peers. Solomon and Wahler (1973) demonstrated the utility of using popular peers to reinforce appropriate behaviors in the classroom. Students with high social reinforcement value have also been used effectively to increase attendance James Vincent is currently in the doctoral program in the School of Psychology at the University of Nebraska-Lincoln. Daniel Houlihan, Ph.D. is Assistant Professor of Clinical Psychology at Mankato State University, Mankato, MN. Patricia Mitchell is the director of the Forest Ridge