Read Naturally® shows mixed effects on reading fluency for beginning readers (average improvement index +7 percentile points)¶
Claim · All claims
Evidence · 1 study · quant-synthesisr2·q3
Currency · newest study 2013 · 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? Across four studies including 440 students, Read Naturally® had mixed effects on reading fluency, with an average improvement index of +7 percentile points (range +1 to +18). → Read Naturally® Updated July 2013 — WWC Intervention Report 2013
Evidence¶
Read Naturally® Updated July 2013 — WWC Intervention Report 2013¶
Read Naturally® Updated July 2013 — WWC Intervention Report. (2013). What Works Clearinghouse, U.S. Department of Education. https://ies.ed.gov/ncee/wwc/InterventionReport/407
q3 · i? · quant-synthesis · r2
WWC synthesis of four studies meeting standards without reservations in the reading fluency domain. Table 1 prints the rating "Mixed effects" with an average improvement index of +7 and a range of +1 to +18 across 440 students, with a medium to large extent of evidence.
"Reading fluency Mixed effects +7 +1 to +18 4 440 Medium to large"
Discussion¶
Learner Variables¶
- Reading and Language — outcome: instruction changes it
- Reading Fluency — outcome: instruction changes it
Related Claims¶
- Read Naturally® shows no discernible effects on comprehension for beginning readers — related
- Read Naturally® shows no discernible effects on alphabetics for beginning readers — related
- Read Naturally® shows potentially positive effects on general reading achievement for beginning readers (average improvement index +10 percentile points) — related
- The WWC rates PALS as having potentially positive effects on alphabetics, no discernible effects on fluency, and mixed effects on comprehension for beginning readers — related
- Lexia Reading shows no discernible effects on reading fluency — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
read-naturally-mixed-effects-reading-fluency |
title |
Read Naturally® shows mixed effects on reading fluency for beginning readers (average improvement index +7 percentile points) |
description |
Read Naturally® shows mixed effects on reading fluency for beginning readers (average improvement index +7 percentile points) |
status |
review |
evidence_strength |
mixed |
newest_evidence |
2013 |
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 — read-naturally-updated-july-2013-wwc-intervention-report-2013 |
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