Thus, a multiwave panel design is not always necessary, even though it has become the preferred method of conducting perceptual deterrence research. The study that was replicated and extended was reported by Anderson and others in 1977, using data gathered at Florida State University in 1970. That study sought to determine the relationship between self-reported marijuana use during the preceding year and current perceptions of the risk of formal and informal sanctioning. The replication study analysis used data from 710 undergraduates at the Ohio State University in April of 1982. It operationalized the variables in a different way from that used by Anderson. It asked about current marijuana use and used current perceptions as proxies for immediately prior perceptions, thereby probing the effects of perceptions on behavior. The analysis showed perceptions of informal sanctions and other extralegal behaviors to be helpful in understanding patterns of marijuana use. Perceptions of formal sanctions were not helpful. Recommendations for further research, tables, figure, and 27 references.