According to the RDIConnect website, accessed on 8 June 2018,
“Relationship Development Intervention (RDI) offers treatment programs for individuals and families that face Autism Spectrum Disorders and other developmental difficulties.”
According to the Connections Center website (the predecessor to the RDIConnect website), accessed on 10 October 2008,
"We find that all people on the autism spectrum can benefit from the RDI Program. It appears to be helpful regardless of IQ, language, gender or diagnosis. The most important factor in determining the rate of improvement is the degree to which we have to overcome obstacles like the child's desire to control others, and the presence of co-occurring illnesses."