Effectiveness of intervention focused on vocational course vocabulary in post-16 students with (developmental) language disorder.
S H Ebbels, L Bannister, B Holland and 1 others
PMID 35859265WHAT IT FOUND
Nine 30-minute speech and language therapy sessions targeting vocational course vocabulary led to significantly greater progress in word knowledge than classroom teaching alone.
This benefit remained 14 weeks later. Progress was seen across nouns, verbs and adjectives.
Key findings
01Targeted words showed significantly greater gains than control words at post-intervention and maintenance.
02Participants received nine weekly 30-minute one-to-one sessions, totaling 4.5 hours of direct intervention.
03Intervention effects were similar across all word classes (nouns, verbs, adjectives) and task types.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study used a within-participants design, so there was no independent control group of students receiving no intervention. Assessors were not blinded to the intervention status of the words, which could introduce bias, although double-marking of 36% of tests showed high agreement. The intervention was multifaceted (word maps, Quizlet, discussion), so it is not possible to determine which specific components drove the progress. Participants also made progress on control words, likely due to classroom teaching, so the study isolates the *additional* benefit of SLT rather than SLT versus no support. Students with lower baseline vocabulary scores benefited less, suggesting the current intensity may be insufficient for those with more severe difficulties.
Declared interests
The study was provided in accordance with school and college policies as part of usual clinical practice with no additional funding. No specific conflicts of interest are declared in the text provided.
The easy way to misread this
Do not interpret the progress on control words as evidence that classroom teaching alone is sufficient. The study shows that targeted SLT intervention provided significantly *greater* progress than classroom exposure alone, and this additional benefit was maintained over time.