This research examined the relation between students' preferences for curricular activities and the occurrence of problem and desirable behaviors in 3 students with moderate intellectual disabilities. Activity preference was determined with a systematic assessment procedure. Subsequently, the influence of activity preference on student behavior was evaluated using a reversal design. Results showed that preferred activities were associated with reduced levels ofproblem behavior and increased levels of desirable behaviors. The findings of this investigation contribute to the applied literature on activity preference and suggest directions for future research in the areas of curriculum design, preference, and curricular modifications as a viable behavior-management strategy.DESCRIPTORS: preferred activities, problem behavior, preferenceThe use of preferred stimuli and the provision of opportunities to make choices are increasingly acknowledged as motivational factors in skill acquisition. These factors have been associated with improved task performance (Mithaug & Mar, 1980;Parsons, Reid, Reynolds, & Bumgarner, 1990), increases in spontaneous speech (Dyer, 1987;Peck, 1985), and gains in response accuracy (Pace, Ivancic, Edwards, Iwata, & Page, 1985).There is limited but growing evidence that these strategies can also be used as management tools for preventing and reducing problem behaviors (CooThis investigation was supported by Student-Initiated Research Grant HB023B10059 from the U.S. Department of Education (Office of Special Education Programs) and Cooperative Agreements G0087C0234 and H133B2004 from the U.S. Department of Education (National Institute on Disability and Rehabilitation Research). Opinions expressed in this manuscript are those of the authors and no official endorsement should be inferred. The authors acknowledge Jim Forristal, Leslie Morris, Steve Eichhorn, and the teachers and staff of Dover Exceptional Student Center in Dover, Florida, for their invaluable assistance, flexibility, and collaboration during this project. We also acknowledge the exceptional data collection efforts of Denise