A Study on the Prevalence of Mental Disorders among the Mentally Retarded Adolescents of Karaj

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Abstract. The goal of this research is to study the prevalence of mental disorders among the educable mentally retarded people. The method is descriptive and the statistical population includes all the educable mentally retarded adolescents in Karaj aging between 12 and 18. The sample size includes 200 educable mentally retarded adolescents who were the patients of the well-being residential centers and special schools and who were chosen based on convenience sampling. The research tool is “the Riss Screen for dual diagnosis in children” that evaluates 10 mental disorders. The data is analyzed using descriptive statistics (frequency distribution, mean, standard deviation). Based on the results, in the aggregate, the prevalence of mental disorders in mentally retarded adolescents is estimated 29. 5 percent. Among the disorders, the anger/Self Control disorder, attention deficit disorder and conduct disorder had the highest prevalence among the sample educable mentally retarded adolescents, respectively. Based on the research, it is recommended that in addition to cognitive problems, the psychological problems of these children should be taken into consideration.


Prevalence, Mental retardation, Mental Disorder

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