Designing, Developing and Standardizing of National Scale Adaptive Behavior in Children with Intellectual Disability

The purpose of the present research was to identify the psychometric properties of the “NSAB” in Intellectual Disability Children. The present study is in the field of psychometric planning. The research sample consisted of adaptive behavior assessment specialists, mentors and parents of children with intellectual disability in private and public centers, the Welfare Organization and the Exceptional Organization of Tehran Province in 2018, is located in an infinite number of societies with approximately 5,000 members whose male participants were 1.5 times more than the females. With an emphasis on the available sample, 1200 people were selected. The findings of the research showed that “NSAB” using the two methods Cronbach's alpha and Spearman-Brown modification tests had a validity coefficient of 0.89 and 0.86, respectively, indicating internal consistency. The stability coefficient in the present research was 0.79, which confirmed the reliability of the instrument. The “NSAB” had diagnostic validity in seven domains of social use, pre-school performance, health and safety, self-care, social and motor behavior, and was identified as a construct according to the exploratory factor analysis of the 10 National Scale of Adaptive Behaviors.