Bullock (2005) RCT found no statistically significant Accelerated Reader effects on reading fluency (DIBELS Oral Reading Fluency)¶
Claim · All claims
Evidence · 1 study · reviewr3·q3
Currency · newest study 2010 · checked against its sources 2026-10-18 (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? In a randomized controlled trial across grades 4 and 5, Accelerated Reader showed no statistically significant effect on the DIBELS Oral Reading Fluency subtest, and the WWC-calculated average effect size fell below the 0.25 substantively-important threshold. → Accelerated Reader™ 2010
Evidence¶
Accelerated Reader™ 2010¶
Accelerated Reader™. (2010). WWC Intervention Report: Accelerated Reader™, Adolescent Literacy. What Works Clearinghouse, U.S. Department of Education. http://www.renlearn.com/ar/
q3 · i? · review · r3
Randomized controlled trial in one Oregon elementary school: 39 treatment students compared with 43 control students in grades 4 and 5 after 10 weeks. The WWC-calculated average effect size was "not large enough to be considered substantively important" (below 0.25).
"The author did not find statistically significant effects of Accelerated Reader ™ on the Dynamic Indicators of Basic Early Literacy Skills (DIBELS), Oral Reading Fluency subtest across grades 4 and 5."
Discussion¶
Learner Variables¶
- Reading and Language — outcome: instruction changes it
- Reading Fluency — outcome: instruction changes it
Related Claims¶
- Bullock (2005) RCT found no statistically significant Accelerated Reader effects on comprehension (STAR and 4J Vocabulary) — related
- The evidence base for Accelerated Reader with adolescent learners is thin: only 2 of 318 reviewed studies met WWC standards — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
bullock-rct-null-reading-fluency-dibels |
title |
Bullock (2005) RCT found no statistically significant Accelerated Reader effects on reading fluency (DIBELS Oral Reading Fluency) |
description |
Bullock (2005) RCT found no statistically significant Accelerated Reader effects on reading fluency (DIBELS Oral Reading Fluency) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2010 |
source_checked |
2026-10-18 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — accelerated-reader-2010 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.