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) |
| Psychometry | |
| Implementation |
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 |