An evaluation of the Autism Behavior Checklist.

Saunders et al. (1988) tested the Autism Behavior Checklist. This is a parent-fill form that flags autism traits. They gave the checklist to kids with autism and to typically developing kids. Then they checked if scores could tell the groups apart.

The checklist did separate the two groups. But it also called some typical kids autistic and missed some autistic kids. Reliability and validity still needed work.

Wang et al. (2020) later looked at 22 autism screens used in China. The ABC was one of them. The review says many clinics still lean on old checklists instead of gold-standard tools. McKenzie et al. (2012) and Einfeld et al. (1995) show the pattern repeats in other fields. They found good accuracy for the CAIDS-Q and DBC when those tools were tested on kids with intellectual disability. Together these papers say: caregiver checklists can help, but each one needs its own proof before you trust the numbers.

Use the ABC only as a first pass. Pair it with an ADOS, ADI-R, or other gold tool before you tell a family yes or no. Update your intake packet now: list the ABC under screening, not diagnosis, and add a second step for full testing.