A MENU OF POTENTIAL REINFORCERS IN A METHADONE-MAINTENANCE PROGRAM

This study demonstrates the use of paired comparisons and interval sca ling techniques for measuring the relative priority of program privile ges available at a methadone maintenance clinic. Fifteen methadone pro gram privileges were combined in all possible pairs (N = 105) on a rei nforcer menu and administered to a group of 12 methadone patients and a second group of counselors (N = 4). Data were converted to interval scales using the law of comparative judgment to form a quantitative co ntinuum from least to most prefereable. Free methadone, free dental se rvice, and more take-homes were ranked highest in both groups; however , patients showed less differentiation in their preference for these p rivileges. Dose decreases were least preferred. Results are discussed in terms of their clinical applicability in identifying privileges for potential use in modifying the behavior of drug abusers. The method o f paired comparisons has excellent psychometric properties and may off er some advantages over other response scale formats.