The first national guidelines for diagnosing autism were released for public consultation last week. The report by research group Autism CRC was commissioned and funded by the National Disability Insurance Scheme (NDIS) in October 2016.

The NDIS has taken over the running of federal government early intervention programs that provide specialist services for families and children with disabilities. In doing so, they have inherited the problem of diagnostic variability. Biological diagnoses are definable. The genetic condition fragile X xyndrome, for instance, which causes intellectual disability and development problems, can be diagnosed using a blood test.