THE BEGINNINGS OF BEHAVIOR THERAPY WITH DELINQUENTS ARE TRACED TO THE EARLY 1960'S WHEN A NUMBER OF CASE STUDIES AND DEMONSTRATION PROJECTS WERE FIRST PRESENTED. CURRENT PRACTICES ARE REVIEWED IN MORE DETAIL. IN INSTITUTIONS FOR DELINQUENTS, MANY TOKEN ECONOMIES HAVE GRADUALLY DEVELOPED; THEIR SHORTCOMINGS AND RESULTS ARE DISCUSSED. IN CLINIC SETTINGS, SEVERAL INDIVIDUAL AND GROUP TECHNIQUES ARE REVIEWED ARE THEY ARE CURRENTLY PRACTICED. A MAJOR TREND IS SEEN AS BEING AWAY FROM INSTITUTIONAL AND TRADITIONAL CLINIC BEHAVIOR THERAPY. DIRECT COMMUNITY INTERVENTION IS SEEN AS THE MOST PARSIMONIOUS MODE FOR MODIFYING AND PREVENTING DELINQUENT BEHAVIOR, AND SEVERAL MODEL PROGRAMS ARE DESCRIBED. (AUTHOR ABSTRACT)