Main Article Content
Aggressive behavior is a major problem and affects the country in various aspects. The most aggressive behavioral problems were found in early adolescents and likely to increase. The purpose of this quasi-experimental study was to examine the effectiveness of applying theory of planned behavior program on aggressive behaviors among male students in secondary school in Bangkok. The participants aged 13-15 years old. They were randomly assigned into the experimental group (n=24) and the control group (n=24). The instruments employed in the study consisted of Theory of planned behavior program and instruments employed during the experiment and data collection. All instruments were verified for content validity by 3 professional experts. The reliability was reported using Cronbach’s alpha as .907. Data were analyzed using mean, standard deviation, Chi-square, Independent t-test and Repeated Measure ANOVA. Results found that in the posttest and follow-up phase, the experimental group had statistically significant higher scores of negative attitude towards aggressive behaviors, subjective norms, self-efficacy of the aggressive behaviors control and intention to commit aggressive behaviors control than in the pretest and the control group (p <.05).
The experimental group had a statistically significant lower score of aggressive behaviors in the posttest and follow-up phase than in the pretest and the control group (p<.05). In summary, applying theory of planned behavior program on aggressive behaviors among male students in secondary school in Bangkok could increase the negative attitude towards aggressive behaviors, subjective norms, self-efficacy of the control and intention to commit aggressive behaviors control score and decrease the aggressive behaviors.
Article published Is the copyright of the Journal of Health and Nursing Research (Boromarajonani College of Nursing, Bangkok) Cannot be republished in other journals
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