The UK C-BiLLT: Validity and reliability of an online assessment of spoken language comprehension for children with severe motor disorders.
Lindsay Pennington, Lily Potts, Janice Murray and 8 others
PMID 40103280WHAT IT FOUND
The UK C-BiLLT accurately measures spoken language comprehension in children aged 18 months to 7.5 years.
It is reliable for typical development and acceptable for children with severe motor disorders who use eye gaze or switches, though it may take up to an hour to complete.
Key findings
01The UK C-BiLLT demonstrates excellent internal consistency and test-retest reliability in typically developing children.
02Scores on the UK C-BiLLT strongly correlate with established language assessments, supporting its validity as a measure of spoken language comprehension.
03Children with severe motor disorders and their caregivers found the assessment acceptable and accurate, although completion times were variable.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The sample of children with motor disorders was small (24 children) and recruited from tertiary services, so it may not represent all children referred for AAC. All children with motor disorders in the study were at least 4 years old, despite the test being designed for children from 18 months. The typically developing sample had lower non-verbal cognitive scores than expected, possibly due to pandemic-related educational disruptions. The test may take up to an hour to complete, which can be fatiguing for some children.
Declared interests
The authors declared no conflicts of interest. The study was funded by the Action Medical Research and the Peter Sowerby Foundation.
The easy way to misread this
Do not assume the test is validated for children with motor disorders under 4 years of age. The practicability study only included children aged 4 to 12 years, so its suitability for younger children with severe motor disorders is not yet established.