Measure What You Treat: Using Language Sample Analysis for Grammatical Outcome Measures in Children with Developmental Language Disorder.
John F Gallagher, Jill R Hoover
PMID 41694623WHAT IT FOUND
After treatment, language samples from six children with developmental language disorder showed improved use of the treated grammar target.
Average utterance length and vocabulary diversity did not consistently show progress.
Key findings
01Half of the children showed little-to-no growth in mean utterance length after treatment, while the other half showed appreciable growth.
02Type-token ratio scores moved toward the middle: the three children with the highest pre-treatment scores decreased and the three with the lowest increased after treatment.
03Accuracy of the treated grammar marker increased in most children, with reported differences from 8.0% to 48.8%, and five children reached or maintained the maximum productivity score of 5 points.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study included only six children, so it cannot show how many children would respond this way. This was a case series with each child compared before and after treatment, not a trial with a control group. The small sample prevented statistical analysis that could support broad conclusions. Only the third-person singular -s morpheme was examined, so the results may not apply to other grammar targets. The productivity score had a ceiling effect, so it may not show further growth once a child reaches 5 points. The dense and sparse verb exemplar conditions were not analysed in this paper. Children with developmental language disorder are not a homogeneous group, so individual response varied.
The easy way to misread this
Do not read the post-treatment gains in accuracy and productivity as proof that this treatment works for children with developmental language disorder. The study included six children, compared each child before and after treatment without a control group, and aimed to compare outcome measures rather than test treatment efficacy.