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Thai children and youth have on increased tendency to be aggressive. A part of aggressive behavior is the result of reduced emotional intelligence. This is a quasi-experimental research to study the effect of emotional intelligence development program on aggressive behavior among boys in home for boys. The samples (n = 60) were aged 9-11 year, residing in home for boys in Metro Bangkok and the vicinity area. The emotional intelligence development program was applied from concept of Emotional Intelligence of the Mental Health Department, the Ministry of Public Health for 10 weeks. We assessed emotional intelligence by the mentor and aggressive by themselves behavior before, after and follow up by mentor and themselves. The statistics included percentage, mean, and standard deviation. In addition to using chi- square and repeated measure ANOVA.
The results showed that the emotional intelligence score and aggressive behavior score were significantly different among before, after and follow up in the experimental group with a level of significance (p = .000). However, there was no significant difference between groups across time (p = .708).