Lexia Reading shows no discernible effects on reading fluency¶
Claim · All claims
Evidence · 1 study · quant-synthesisr1·q3
Currency · newest study 2009 · checked against its sources 2026-10-17 (automated, 1 of 1 entry) · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? The WWC rates Lexia Reading as having no discernible effects on fluency, with an improvement index of +9 percentile points and a domain average effect size of 0.22 that was not statistically significant. → What Works Clearinghouse 2009
Evidence¶
What Works Clearinghouse 2009¶
What Works Clearinghouse, U.S. Department of Education. (2009). WWC Intervention Report: Lexia Reading, Beginning Reading. https://ies.ed.gov/ncee/wwc/InterventionReport/274
q3 · i? · quant-synthesis · r1
WWC synthesis of fluency findings from Gale (2006), the only study contributing fluency outcomes (DIBELS Oral Reading Fluency). The domain average effect size was 0.22, not statistically significant, and the report states "The improvement index for fluency is +9 percentile points."
"The improvement index for fluency is +9 percentile points, with a range of –15 to +30."
Discussion¶
Learner Variables¶
- Reading and Language — outcome: instruction changes it
- Reading Fluency — outcome: instruction changes it
Related Claims¶
- Read Naturally® shows mixed effects on reading fluency for beginning readers (average improvement index +7 percentile points) — related
- Lexia Reading shows no discernible effects on general reading achievement — related
- Lexia Reading has potentially positive effects on comprehension — related
- Lexia Early Reading outperforms no supplemental instruction on kindergarten alphabetics outcomes in Gale (2006), significant by author but not WWC calculations — related
- Lexia Reading has potentially positive effects on alphabetics for beginning readers — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
lexia-reading-no-discernible-fluency |
title |
Lexia Reading shows no discernible effects on reading fluency |
description |
Lexia Reading shows no discernible effects on reading fluency |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2009 |
source_checked |
2026-10-17 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2009 |
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