Bullock (2005) RCT found no statistically significant Accelerated Reader effects on comprehension (STAR and 4J Vocabulary)¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2010 · not yet checked against its sources · 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 the same randomized controlled trial, Accelerated Reader showed no statistically significant effects on the STAR reading test across grades 4 and 5 or on the 4J Vocabulary test for grade 4. → 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? · causal · r2
Comprehension-domain findings from the Oregon RCT (39 treatment vs. 43 control students). The WWC-calculated average effect size across the two grades was not large enough to be considered substantively important (below 0.25).
"Bullock (2005) did not find statistically significant effects of Accelerated Reader™ on the Standardized Test for Assessment of Reading (STAR) across grades 4 and 5, or on the 4J Vocabulary test for grade 4."
Discussion¶
Related Claims¶
- Bullock (2005) RCT found no statistically significant Accelerated Reader effects on reading fluency (DIBELS Oral Reading Fluency) — related
- The evidence base for Accelerated Reader with adolescent learners is thin: only 2 of 318 reviewed studies met WWC standards — a broader claim this one bears on
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
bullock-rct-null-comprehension-star-vocabulary |
title |
Bullock (2005) RCT found no statistically significant Accelerated Reader effects on comprehension (STAR and 4J Vocabulary) |
description |
Bullock (2005) RCT found no statistically significant Accelerated Reader effects on comprehension (STAR and 4J Vocabulary) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2010 |
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.