Self-injury behaviors in children with autism may be more intense in children with severe intellectual disability than in other children with autism.

This study asked whether self injury, aggressive, and stereotypy behaviors were more common in some groups of children with autism than others. The researchers tested age, gender, therapy interventions, and intellectual disabilities. Age and gender were not a factor. Children getting applied behavior analysis therapy (ABA) had aggressive behaviors more often than other children, but the authors think that might be because children with behavioral problems are more likely to get therapy. Children with severe intellectual disabilities had more intense self-injury behaviors than other children with autism.