Professional development and signed literacy instruction: evidence from a multiple-baseline design.
Leala Holcomb, Leah Oakes
PMID 41060874WHAT IT FOUND
Four deaf teachers in ASL/English classrooms moved from near-zero to high fidelity in signed literacy instruction after two days of training plus biweekly coaching.
Teachers without prior experience achieved the same gains. Student outcomes were not measured.
Key findings
01Teachers' fidelity to signed literacy instruction rose immediately after professional development, reaching 45-60% for the first unit and 80-90% for final sessions in three of four teachers.
02The provisionally licensed teacher achieved high fidelity, showing that a scaffolded routine with coaching can support newer teachers without prior experience in this specific method.
03Student outcomes were not reported; the study measured only whether teachers implemented the instructional steps correctly.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study included only four teachers from a single program, so results cannot be generalized to other settings. No student outcomes were measured. The study reports that teachers implemented the methods, not that students learned anything. The lead author served as both the trainer and the primary rater of fidelity, which introduces potential bias even with a second rater. Raters knew whether a lesson was from the baseline or intervention phase, so blinding was not possible. The intervention was woven into existing curriculum pacing guides, which may have constrained how deeply the new methods could be applied.
Declared interests
None declared.
The easy way to misread this
Do not assume this study proves that signed literacy instruction improves student outcomes. The research measured only whether teachers followed the instructional steps correctly; it did not assess student progress in composition or language skills.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →