About the Measure

Domains Language
Subscales Comprehension and production scale
Target Construct Oral language: Understanding and production of selected vocabulary items and grammatical features.
Description Used by therapists to identify speech and language delays and impairments in young children. The Scales have been revised, improved and newly standardised on more than 1,200 children in the UK.
Test Authors Edwards, S., Letts, C. & Sinka, I.
Publisher GL-Assessment (2011)

Implementation details

Respondent Child
Prior knowledge Required Speech language therapists. Tester should be familiar with this test.
Scoring Clear and transparent scoring criteria,
Time 45 to 60 minutes
Age 2 years to 7 years and 6 months

Psychometric details

UK norms YES
Norm / Criterion referenced Norm referenced
Standardisation sample 1266
Reliability Kuder-Richardson Formula 20. Comprehension .95 (.95-.55); Production .96 (.95-.73). Test-retest Comprehension .72; Production .77
Criterion validity Insufficient data in the public domain to evaluate
Construct validity Discriminant validity (35 children with primary LI): samples differed significantly
Concurrent validity Concurrent validity with TROG II .69 for comprehension and .63 for production. Concurrent validity with BPVS III .75 for comprehension and .63 for production