Weekly research brief · Dyslexia

What matters.
What to do with it.

A concise, evidence-ranked scan for educational therapists—without the research-paper fog.

7 minute read3 research resources3 practice prompts

This week’s signal

This week's useful distinction is response over label: immediate gains need maintenance, a named phonics program does not prove profile fit, and early screening should open surveillance—not close the case.

What matters this week

Watch the curve, not the label

Vote on each one. Your feedback shapes the next scan.

Medium confidenceNew development · Cluster-randomized controlled trial · Published online September 20, 2026

Short-term Tier 2 gains did not become a durable between-group advantage.

A Swiss school-level randomized trial assessed 358 Francophone first-graders, then compared 45 at-risk children receiving 14 weeks of Tier 2 instruction with 50 controls. Immediately afterward, the intervention group improved more on a reading index (d = 0.48) and complex grapheme knowledge (d = 0.57); 36% were classified as responders versus 10% of controls. One year later, however, reading, phonological-awareness, spelling, and rapid-naming differences were no longer significant, and roughly 41% of intervention children remained at risk. The small at-risk subsample, school clusters, semi-active control, and French orthography limit transfer to English educational therapy. Geneva education authorities funded the work; accessible records did not surface conflicts. This is not August's broad older-reader review: it is a new Grade 1 trial with individual response profiles and a one-year null follow-up.

Why it matters at edcahoots

Track individual trajectories and set maintenance or booster rules before the intensive block ends. Immediate normalization is encouraging, but it does not establish durable response.

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Early/Uncertain confidenceRecent backlog · National cross-sectional survey · First published September 15, 2026

A program name revealed less than the student's measured response.

A national England survey analyzed 223 complete responses from school leaders, literacy leads, special-educational-needs coordinators, and teachers collected in 2025. Among 61 headteachers, 80% reported using a phonics scheme for reading-difficulty intervention. Among 112 practitioners, 62% said that continued nonresponse would prompt individual assessment and a tailored program, while 14% would continue phonics; only 13% ranked research as their primary influence, versus 55% who chose teaching experience. Identification most often relied on teacher observation. The voluntary sample represents a tiny share of England's workforce, reports perceptions rather than observed practice, and includes no learner outcomes, so it cannot rank approaches. The authors reported no funding or conflicts. Unlike September's evidence-claim audit, this study describes reported school decisions and variability, not whether a particular claim is scientifically supported.

Why it matters at edcahoots

When families bring a school plan, ask what is taught, how often, what outcome is monitored, and what changes after nonresponse. 'Phonics' alone is not a treatment specification.

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Medium confidenceRecent backlog · Five-year prospective cohort · Published March 24, 2026

One kindergarten screen could not capture every later risk pathway.

A prospective Israeli cohort followed 515 Hebrew-speaking children from kindergarten through Grade 4, retaining 44.9% of the original 1,146. Poor kindergarten letter knowledge and phonological awareness were associated with Grade 1 dyslexia risk (odds ratios 4.75 and 4.17). Grade 4 risk had a different pattern: early letter knowledge, morphology, and rapid naming each contributed independently, while Grade 1 risk remained predictive. This supports ongoing surveillance, not a single deterministic screen. Major attrition, observational design, Hebrew orthography, and a risk definition based on word-reading-fluency percentiles rather than clinical diagnosis limit generalization; odds ratios are not prediction accuracy. The University of Haifa's Safra Brain Research Center funded the study and had no reported analytic or publication role; authors reported no conflicts. This extends August's California-screening item by addressing late-emerging risk, not screening policy or approved tools.

Why it matters at edcahoots

Treat early screening as a starting probability. Revisit fluency, rapid naming, morphology, and family history when later performance or effort diverges from earlier results.

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Worth watching

Promising, but not practice-changing yet.

A September 20 cross-sectional study of 132 Spanish-speaking children linked different aspects of prosodic sensitivity to reading before and after formal literacy instruction. In 71 preschoolers, lexical prosody related to reading through phonological awareness; in 61 second-graders, phrase-level prosody had both direct and indirect associations. The age contrast is intriguing, but this was correlational, used separate age groups rather than following the same children, and did not test an intervention or dyslexia-specific sample. Watch for longitudinal replications and trials showing whether prosody work adds measurable reading benefit beyond explicit phonological instruction.

Questions for the team

Turn evidence into a useful conversation.

For each client, can we see the trajectory—not just pre/post scores—and name when a booster or target change is triggered?

When a school says 'phonics intervention,' do we know the actual targets, dose, progress measure, and response rule?

Do intake and review notes preserve late-emerging risk signals such as fluency, rapid naming, morphology, and family history?

The feedback loop

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Weekly dyslexia research briefSeptember 27, 2026

What matters this week

Watch the curve, not the label

A new Tier 2 trial found short-term gains that no longer separated groups a year later; an England survey exposes wide practice variation; and a five-year cohort shows why early screening cannot be one-and-done.

Medium confidence · New development · Cluster-randomized controlled trial · Published online September 20, 2026

Short-term Tier 2 gains did not become a durable between-group advantage.

Takeaway

A Grade 1 cluster trial produced moderate short-term reading gains, but intervention-control differences disappeared one year later.

Practice implication

Track individual trajectories and plan maintenance or booster support before short-term gains fade.

Early/Uncertain confidence · Recent backlog · National cross-sectional survey · First published September 15, 2026

A program name revealed less than the student's measured response.

Takeaway

In an England survey, 80% of headteachers reported phonics interventions, while only 13% of practitioners ranked research first.

Practice implication

Ask what is taught, measured, and changed—not merely which program name appears.

Medium confidence · Recent backlog · Five-year prospective cohort · Published March 24, 2026

One kindergarten screen could not capture every later risk pathway.

Takeaway

A five-year cohort linked different kindergarten skills to early- versus late-emerging dyslexia risk; 55% of the original cohort was lost.

Practice implication

Treat early screening as probabilistic; revisit fluency, rapid naming, morphology, and family history over time.

Questions for the team

• For each client, can we see the trajectory—not just pre/post scores—and name when a booster or target change is triggered?

• When a school says 'phonics intervention,' do we know the actual targets, dose, progress measure, and response rule?

Primary sources

1. Ardanouy et al. · Reading Psychology: https://doi.org/10.1080/02702711.2026.2735241

2. Rahimi et al. · Literacy: https://doi.org/10.1111/lit.70050

3. Yinon et al. · JAMA Network Open: https://doi.org/10.1001/jamanetworkopen.2026.3036

What matters.What to do with it.

Watch the curve, not the label

Short-term Tier 2 gains did not become a durable between-group advantage.

A program name revealed less than the student's measured response.

One kindergarten screen could not capture every later risk pathway.

Promising, but not practice-changing yet.

Turn evidence into a useful conversation.

Your reaction changes next week’s brief.

Watch the curve, not the label

Short-term Tier 2 gains did not become a durable between-group advantage.

Takeaway

Practice implication

A program name revealed less than the student's measured response.

Takeaway

Practice implication

One kindergarten screen could not capture every later risk pathway.

Takeaway

Practice implication

Questions for the team

Primary sources

What matters.
What to do with it.