Criterion Validity, Scalability and Stability of Scoring on the Bayley-III in Children With Angelman Syndrome.

ABSTRACT:

Background

The Bayley Scales of Infant Development is used in many studies and clinical trials in children with developmental disabilities, including children with Angelman syndrome (AS).

Method

We assessed 142 children with AS in an international multicentre study with the Bayley Scales of Infant Development III, of which 52 children were tested more than once. We assessed criterion validity using proportion analysis, scalability using Mokken analyses and stability of scoring by counting pass-to-fail and fail-to-pass items.

Results

Results revealed good scalability in all scales but the expressive language scale, indicating that the items of these scales measured one underlying trait. In the expressive language scale, the AS-related speech difficulties invalidated sc

SUBMITTER: Ten Hooven-Radstaake M 

PROVIDER: S-EPMC12580475 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature