Child abuse and disobedience is on inevitable phase in the growth. Defiant disobedience disorder is the most common mental disorder occurring in 2-16 % of the children of pre-elementary or in the beginning of school age.The paresent study aimed in studying the effectiveness of behavioral theapy on the decrease of defiant disobedience disorder symptoms. The research is the kind of pre-exam and post-exam by a control group. The statistical society of the research is the whole students stuffering from oppositional defiant disorder in a state school in behshahr based on accidental manner, 12 students were selected as samples. The tools of data collecting in the study is the questionnaire ODD, the reliability of oppositional defiant disorder was studied through Cronbach's alpha and was measured by 0/75. The research data analysis was given through deseriptive statistics using the SPSS software. The finding results of the study shows that in the pre-test phase,the mean and standard deviation of the objection and disobediebce disorder symptoms are 5/83 and 1/83, respectively, and the control group as 7 and 1/26 and in the post-test phase, the mean and the standard deviation of testing group were 3/33 and 2/42 and 6/33 and 1/03 in control group, respectively. The total aim of the study is collecting the data about studying the effectiveness of behavioral cognitive therapy on the decrease of symptoms from defiant disobedience disorder.
