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Standard scores of the Repetitive Behavior Scale-Revised for people with autism and intellectual disability in Spain.

INTRODUCTION
Repetitive behavior is a transdiagnostic variable that is present in many neurodevelopmental disorders. The Repetitive Behavior Scale-Revised (RBS-R) by Bodfish is one of the tests most used to evaluate repetitive behaviors in people with autism and intellectual disability.


MATERIALS AND METHODS
In the present article, we analyze the differences in repetitive behavior according to the diagnosis, the interaction effects between diagnoses and gender and/or age and display the standard scores of the RBS-R for a group of people with autism, a group of people with intellectual disability and another group of people with Autism and intellectual disability.


RESULTS
The results indicate that there are differences in the repetitive behavior between the groups, being greater the severity of the repetitive behaviors in people with autism associated to intellectual disability, followed by autism, and finally intellectual disability. Finally, the RBS-R percentiles according to diagnostic groups are shown.


CONCLUSIONS
The RBS-R has been shown to be a useful diagnostic tool for assessing some of the main neurodevelopmental disorders, such as autism spectrum disorders and intellectual disability.