Diagnostic Utility of the Gilliam Autism Rating Scales-3rd Edition Parent Report in Clinically Referred Children.

Camodeca (2023) tested the Gilliam Autism Rating Scale-3 Parent Report. The team wanted to know if this parent form gives clear yes-or-no answers for kids sent to a clinic.

They looked at sensitivity, specificity, and agreement with other tools. The sample was 90 boys and young men already in the referral stream.

The scale showed good to excellent inter-rater agreement. Sensitivity and specificity were strong, and scores lined up well with other autism measures.

In plain words, when parents filled out the GARS-3, the numbers usually matched what clinicians later decided.

Lord et al. (1997) set the groundwork by showing the ADI-R interview works across ages. Camodeca (2023) keeps that lineage but swaps the long interview for a short parent checklist.

Ferreri et al. (2011) found the 15-minute CASD and SRS parent forms agreed with the 2-hour ADI-R over 90 % of the time. Amy’s results echo that speed does not have to hurt accuracy.

Payne et al. (2020) saw the parent-report AQ-Adult-HK beat the self-report version. Amy adds another parent form that wins on the same metrics, tightening the case that parents often give the clearest picture.

You now have one more parent scale that is fast, free from clinician bias, and holds up psychometrically. Use it during intake to screen clinic referrals or to double-check your own ADOS findings. If the parent GARS-3 score is high, move the case up the queue; if it is low but you still suspect ASD, keep digging. The tool saves interview minutes without trashing validity.