Lexia Reading has potentially positive effects on comprehension¶

Claim · All claims
Evidence · 1 study · review r3 · q2 · i1 small
Currency · newest study 2009 · checked against its sources 2026-10-20 (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.

q2 i1 The WWC rates Lexia Reading as having potentially positive effects on comprehension, based on a single outcome with an improvement index of +11 percentile points and an effect size of 0.27 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

q2 · i1 · review · r3

WWC synthesis of comprehension findings from Macaruso and Walker (2008), whose quasi-experimental design met standards with reservations. The Gates-MacGintie Listening Comprehension subtest showed an effect size of 0.27, not statistically significant but substantively important; the report notes the index reflects "only one outcome."

"The improvement index for comprehension is +11 per - centile points, reflecting only one outcome."

Discussion¶

Learner Variables¶

Reading and Language — outcome: instruction changes it

Lexia Reading shows no discernible effects on general reading achievement — related
Lexia Reading has potentially positive effects on alphabetics for beginning readers — related
Lexia Reading shows no discernible effects on reading fluency — related
Reading Go! showed positive but not statistically significant effects on reading comprehension — related
Theory-based reading motivation interventions have a small significant positive effect on reading comprehension (d = 0.27) — related
SpellRead™ shows potentially positive effects on comprehension for adolescent readers, with an average improvement index of +11 — related
The WWC rates Project CRISS® as having potentially positive effects on comprehension for adolescent learners, with an average improvement index of +20 percentile points — related
WWC finds Cooperative Integrated Reading and Composition® has potentially positive effects on comprehension for adolescent learners (average improvement index +7 percentile points) — related

Page metadata

Field	Value
`type`	`claim`
`id`	`lexia-reading-potentially-positive-comprehension`
`title`	`Lexia Reading has potentially positive effects on comprehension`
`description`	`Lexia Reading has potentially positive effects on comprehension`
`status`	`review`
`evidence_strength`	`weak`
`newest_evidence`	`2009`
`source_checked`	`2026-10-20`
`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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