Expanding on previous literature, this study examined differences in occurrence and context of unwanted sexual experiences in one campus community in two similar cohorts of undergraduates studied 12 years apart. The study examined differences in prevalence rates from 1988 to 2000 and compared characteristics of unwanted experiences from these two cohorts. Comparisons were also made of contextual characteristics for unwanted sexual contact and unwanted sexual intercourse for data collected in 2000. Comparisons of prevalence and characteristics from 1988 to 2000 were done only for female participants. The study is consistent in the high prevalence of acquaintances as perpetrators and in the occurrence of rape in residences and in the context of social functions. The study found a decrease in only the less severe form of unwanted sexual experiences: unwanted contact. The rates of unwanted sexual intercourse did not show a change during the 12-year period. The study contributes to the understanding of ways in which rates of unwanted sexual experience may shift or stay the same throughout time. References