CIRC shows no discernible effects on general reading achievement for beginning readers (effect size 0.02)¶
Claim · All claims
Evidence · 1 study · causalr3·q3·i0negligible
Currency · newest study 2012 · 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 i0 The WWC found no statistically significant or substantively important difference between CIRC and comparison groups on the Iowa Test of Basic Skills Reading Achievement (effect size 0.02, improvement index +1). → itbs-null
Evidence¶
itbs-null¶
U.S. Department of Education, Institute of Education Sciences, What Works Clearinghouse. (2012, June). Beginning Reading intervention report: Cooperative Integrated Reading and Composition®. https://ies.ed.gov/ncee/wwc/InterventionReport/109
q3 · i0 · causal · r3
Stevens, Slavin, and Farnish (1989), describing the same trial as Stevens et al. (1991), reported ITBS Reading Achievement results without inferential contrasts; WWC calculations on 320 students across 20 classes found an effect size of 0.02 and improvement index of +1, p > 0.05. This yields a no-discernible-effects rating with small extent of evidence.
"The WWC calculations determined that there was not a statistically significant or substantively important difference between the groups on this outcome."
Discussion¶
Related Claims¶
- Stevens and Slavin (1995) found statistically significant positive effects of CIRC on CAT Reading Comprehension and Vocabulary subtests, while Jewell (1994) found no statistically significant effects — related
- In a quasi-experimental study, CIRC showed no statistically significant effect on comprehension outcomes after WWC clustering and multiple-comparison adjustments — related
- CIRC has potentially positive effects on comprehension for beginning readers, with an average improvement index of +12 percentile points across two studies — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
circ-no-discernible-general-reading-achievement |
title |
CIRC shows no discernible effects on general reading achievement for beginning readers (effect size 0.02) |
description |
CIRC shows no discernible effects on general reading achievement for beginning readers (effect size 0.02) |
status |
review |
evidence_strength |
weak |
newest_evidence |
2012 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — itbs-null |
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