This study investigated whether junior college female students overly estimate the rates of those who have sexual experiences among university, high school and junior high school students, and whether these estimations differ with the frequency of the exposure to mass media and with their own sexual experiences. Thirty-six junior college female students replied to the questionnaires. The results show that respondents estimated the rates of those who have sexual experiences higher than the actual rates in all grades for both men and women. The more they read magazines and watch television, the higher they estimated that rates of university students. Those who have sexual experiences estimated that rates of high school and university students higher than those who do not have. The influences of this overestimation to young people were discussed
