Vineland adaptive behavior profiles in children with autism and moderate to severe developmental delay.

Gemma and colleagues looked at Vineland profiles in kids with moderate or severe delay.

They matched autistic and non-autistic children by age, then compared all Vineland scores.

The goal was to see if the Vineland alone could flag autism when delay was already big.

No clear Vineland profile showed up.

Autistic and non-autistic kids with the same delay level looked almost identical on every domain.

The authors warn: do not use Vineland scores alone to tell autism from other delays.

Ferrari et al. (1991) found big social-adaptive gaps in autism, but they matched kids on overall adaptive level, not delay severity.

That earlier study looked stronger because the groups started at the same Vineland total; Gemma’s stricter matching washed the gap out.

Mouga et al. (2015) later confirmed a unique social dip in autism when IQ, not delay, was matched—showing the choice of control matters.

Paul et al. (2004) went deeper, showing tiny expressive-language items, not global scores, can still separate autism from PDD-NOS.

If you test a child with moderate delay, expect low scores everywhere.

Low socialization alone does not prove autism in this group.

Add a developmental history, ADOS, and caregiver interview before you call it.