The purpose of this study was to assess the effect of sex education on knowledge and attitude related to sex. The subjects were taken from by 199 students in 3 classes from 1st grade in H girl´s junior high school as the study group, and 2 classes from 1st grade in S girl´s junior high school as control group. During the survey period(September 21, 1998 to September 30, 1998), 6 times in terms of one-hour class for sex education were taught to the study group. A pre-test was executed on September 19, 1998 and the post-test on September 30. The findings were as follows.
1. According to the research, 20.1% of the subjects have experienced sex education from parents and 89.9% from teacher. They have mostly obtained the sex-related information from teachers(59.8%), following movie, radio, TV or video tape(40.7%), friends(35.2%), reading materials such as books, cartoons, new papers and magazines(31.7%), parents(15.6%), siblings(7.0%), PC(1.5%) and telephone service(1.5%).
2. 27.1% of the subjects reported that they had sex-relatd worry concerning from friendship with the opposite sex, following physiological phenomenon(31.5%), sex violence(11.1%), physical characteristics(7.4%), VD and contraception(5.6%), sexual impulse(5.6%), pregnancy and delivery(5.5%), and sexual behaviour(3.7%). The research showed that the adolescents usually solved their problems through the consultation with their friends(44.4%). However, 16.7% of the subjects were turned out not to request any solution. The other minor routes to settle their problems were written materials such as books, magazines(13.3%), parents(13.0%), movie, radio, TV, or video tape(5.5%), acquainted female elders(3.7%) and teacher(3.7%).
3. The most interesting part regarding sex was the friendship with the opposite sex(61.8%), following adolescent´s emotion(55.8%), physiological differences between two genders(52.8%), AIDS(48.7%), VD(46.7%), pregnancy(45.2%), sex violence(41.2%) and genital structure and secondary sexual characteristics(28.6%).
4. In regard to characteristics of the subjects influencing sex-realted knowledge, the higher educational career of mother, living with at least either parent and the experience of sex education by teachers were statistically significant factors(p<0.005).
5. In regard to characteristics of the subjects influencing attitudes toward sex, the experience of sex education by parents or teachers was a statistically significant factor(p<0.05).
6. The analysis of knowledge score comparing results before and after sex education showed that control group´s score decreased from 12.5 to 12.44 while the study group´s score increased from 12.33 to 21.31, which was statistically significant(p<0.001).
7. The analysis of the attitude scores before and after sex education showed that the control group´s score slightly increased from j55.57 to 56.36, while the study group´s score increased from 54.79 to 61.95, which was statistically significant(p<0.001).
8. The level of sex-related concerns of the study group after sex education marked both the increase in some items and the decrease in others.
9. Most instructive session among the sex education was the third "to be a good friend to the opposite sex"(27.0%).
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