The Effects of a Booster Program for Sexual Risk Behavior Prevention on Attitude, Subjective Norm, Perceived Behavior Control and Sexual Abstinence Intention of the 9th Graders

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Rassawan Sankammeun
Rutja Phuphaibul
Autchareeya Patoomwan


Sexual risk behaviors of adolescents are causes of teenage pregnancy and sexually transmitted diseases. They are considered to be public health problems that require urgent remediation. If sexual abstinence could be achieved, problems from sexual risk behaviors among adolescents could effectively be reduced. This quasi-experimental study aimed to examine the effect of a booster program for sexual risk behavior prevention on attitudes, subjective norms, perceived behavioral control, and sexual abstinence intention of ninth graders. Purposive sampling was employed, and the participants from two schools were those who previously attended “the Sexual Risk Behavior Prevention Program for Sixth Graders” 3 years earlier. The sample included 27 participants in a control group and 27 in an experimental group. The experimental booster instrument was an activity plan. Data-collection instruments were questionnaires on general information, attitudes towards sexual behaviors, subjective norms about sexual behaviors, and perceived behavioral control. Data were analyzed using descriptive statistics, Independent t-test, Mann Whitney U-test, Paired t-test and Wilcoxon signed rank test. Results revealed that 1) after the experiment, the participants with the booster program for sexual risk behavior prevention demonstrated higher means of sexual abstinence intention than before the experiment with statistical significance (p<.05), but indicated no significant difference in means of attitudes, subjective norms, and perceived behavioral control with statistical significance (p>.05); and 2) the participants with the booster program showed higher means of attitudes, subjective norms, perceived behavioral control, and sexual abstinence intention than those in the control group with statistical significance (p<.05). Based on this study, it is recommended that for the booster program to promote desirable behaviors and outcomes, it should be consistently implemented since such behaviors might diminish over time.


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Sankammeun R, Phuphaibul R, Patoomwan A. The Effects of a Booster Program for Sexual Risk Behavior Prevention on Attitude, Subjective Norm, Perceived Behavior Control and Sexual Abstinence Intention of the 9th Graders. NJPH (วารสาร พ.ส.) [Internet]. 2021 Aug. 5 [cited 2022 Nov. 30];31(2):195-208. Available from:


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