Research issue 01 · August 5, 2026

Weekly research brief · Dyslexia

What matters.
What to do with it.

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

8 minute read3 research resources2 practice prompts
This week’s signal

Two developments are new since 2025; the intervention finding is a recent-backlog item with direct implications for session planning and family expectations.

What matters this week

Three shifts to bring into fall tutoring

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

01
High confidenceNew development · State policy

California’s K–2 reading-risk screening is now part of the intake landscape.

Beginning in the 2025–26 school year, every California local educational agency must screen students in kindergarten through grade two for risk of reading difficulties, including dyslexia. Districts select from four state-approved instruments: Amira, mCLASS with DIBELS Edition 8 and mCLASS Lectura, Multitudes, or the Rapid Online Assessment of Reading (ROAR), which is approved only for grades one and two. Three options support both English and Spanish; ROAR is English-only. A 2026 update also bars kindergarten screening before the 91st school day and recommends one-to-one or small-group administration. The purpose is earlier identification and intervention—not diagnosis. A risk flag should lead to closer review, communication with the family, and appropriate instructional follow-up, while a reassuring score should not override other evidence of persistent reading difficulty.

Why it matters at edcahoots

Expect more Los Angeles families to arrive with school screener reports. Add a compact intake field for instrument, date, flagged subskills, and the school’s next step—then explain what the result can and cannot establish.

Read the primary source California Department of Education
02
High confidenceNew development · Field definition

The field’s updated definition makes room for more than a single phonological profile.

The International Dyslexia Association’s 2025 definition—the first major revision of its widely used 2002 wording—defines dyslexia around persistent difficulty with word reading and/or spelling involving accuracy, speed, or both. It describes severity as a continuum and says the pattern persists despite instruction that works for the learner’s peers; this is meant to distinguish dyslexia from short-lived difficulty, not to endorse waiting for a child to fail. The revision also broadens the causal picture: genetic, neurobiological, and environmental influences interact over development, while phonological and morphological processing difficulties are common but not universal. Early oral-language weaknesses may foreshadow later literacy challenges. Secondary effects can reach comprehension, vocabulary, written expression, academic achievement, psychological well-being, and employment, reinforcing the value of identification and targeted support at any age—especially early.

Why it matters at edcahoots

Audit parent-facing language and tutor observation notes. Avoid treating one phonological pattern as a required dyslexia signature; document word reading, spelling, fluency, morphology, and relevant oral-language signals without implying that tutoring observations are a clinical diagnosis.

Read the primary source International Dyslexia Association
03
High confidenceRecent backlog · Meta-analysis

For older struggling readers, more intervention time helps—but broad transfer remains hard-won.

A meta-analysis of 22 studies and 208 effect sizes examined interventions for students in grades 3–12 with significant word-reading difficulties, defined as a standard score of 80 or below on at least one pretest measure. Across outcomes, intervention produced a statistically significant but small average effect (Hedges’ g = 0.14; 95% confidence interval 0.04–0.23). Gains were larger on pseudoword reading (g = 0.38) and pseudoword-reading fluency (g = 0.29), measures that closely reflect taught decoding skills. More total intervention hours were positively associated with outcomes, but that relationship does not by itself prove that simply adding hours will cause proportional gains. The authors’ central caution is that improvement on controlled measures still translated poorly into generalized, real-world reading—so dosage matters, but transfer must be measured rather than assumed.

Why it matters at edcahoots

Set expectations around cumulative dosage rather than a quick breakthrough. Pair controlled decoding probes with periodic transfer checks in unfamiliar words and authentic text so skill growth is not mistaken for generalized reading improvement.

Read the primary source Boucher et al. · Journal of Learning Disabilities

Questions for the team

Turn evidence into a useful conversation.

01

Should the fall intake form capture the school screener, date, subskill results, and follow-up plan—while clearly labeling screening as risk identification rather than diagnosis?

02

Hypothesis: tracking cumulative intervention hours alongside transfer checks would make progress conversations with families more accurate and useful.

Educational therapy research, filtered for practice.

Research information only—not individualized medical, diagnostic, or legal advice. Please do not include student names in feedback.

Weekly dyslexia research briefAugust 5, 2026

What matters this week

Three shifts to bring into fall tutoring

California screening, a broader dyslexia definition, and a realistic evidence check on intervention dosage for older readers.
1

High confidence · New development · State policy

California’s K–2 reading-risk screening is now part of the intake landscape.

Takeaway

Annual K–2 risk screening is now required in California, but a screening result is not a diagnosis.

Practice implication

Capture the screener and subskill results at intake so tutoring starts from a clearer shared baseline.
2

High confidence · New development · Field definition

The field’s updated definition makes room for more than a single phonological profile.

Takeaway

The 2025 definition describes varied, persistent word-reading and spelling profiles—not one required underlying deficit.

Practice implication

Use broader observation language while keeping the boundary between instructional assessment and diagnosis clear.
3

High confidence · Recent backlog · Meta-analysis

For older struggling readers, more intervention time helps—but broad transfer remains hard-won.

Takeaway

Older readers benefit from intervention, especially with greater total dosage, but generalized reading gains are usually modest.

Practice implication

Track cumulative hours and test transfer beyond practiced materials before describing a gain as broad progress.

Questions for the team

• Should the fall intake form capture the school screener, date, subskill results, and follow-up plan—while clearly labeling screening as risk identification rather than diagnosis?

• Hypothesis: tracking cumulative intervention hours alongside transfer checks would make progress conversations with families more accurate and useful.

Primary sources

1. California Department of Education: https://www.cde.ca.gov/ci/cl/index.asp?tabsection=6%2F

2. International Dyslexia Association: https://dyslexiaida.org/2025-dyslexia-definition-project/

3. Boucher et al. · Journal of Learning Disabilities: https://pubmed.ncbi.nlm.nih.gov/37937699/

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