ITSS has positive effects on reading comprehension, based on two studies meeting WWC standards covering 6,724 students¶
Claim · All claims
Evidence · 1 study · quant-synthesisr1·q3·i1small
Currency · newest study 2020 · 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 i1 The WWC found strong evidence of a positive and statistically significant effect of ITSS on comprehension, with an outcome-average effect size of 0.23 and an improvement index of +9 percentile points. → wwc-rating-1
Evidence¶
wwc-rating-1¶
What Works Clearinghouse, Institute of Education Sciences, U.S. Department of Education. (2020, April). Web-based Intelligent Tutoring for the Structure Strategy (ITSS). https://ies.ed.gov/ncee/wwc/InterventionReport/703
q3 · i1 · quant-synthesis · r1
WWC synthesis of two cluster randomized controlled trials (Wijekumar et al., 2012, 2017) in suburban and rural districts across two states, with 6,724 students in grades 4, 5, and 7. The outcome average effect size across all studies was 0.23 and the improvement index +9, described as "positive and statistically significant effect of ITSS on comprehension".
"The WWC determined that one study that meets WWC group design standards without reservations and one study that meets WWC group design standards with reservations showed evidence of a positive and statistically significant effect of ITSS on comprehension"
Discussion¶
Related Claims¶
- In the grades 4-5 cluster RCT, ITSS produced statistically significant positive effects on all six comprehension outcomes (average effect size 0.24) — a narrower finding that bears on this claim
- In the grade 7 cluster RCT, ITSS produced statistically significant positive effects on all eight comprehension outcomes (average effect size 0.23) — a narrower finding that bears on this claim
- ITSS shows a positive but statistically non-significant effect on Grade 4 reading comprehension (effect size +0.10) — related
- ITSS qualifies for a Strong evidence rating based on multiple randomized studies with average effect sizes of +0.15 (elementary) and +0.18 (secondary) — a broader claim this one bears on
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
itss-positive-effects-comprehension |
title |
ITSS has positive effects on reading comprehension, based on two studies meeting WWC standards covering 6,724 students |
description |
ITSS has positive effects on reading comprehension, based on two studies meeting WWC standards covering 6,724 students |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2020 |
generated |
by process:wiki-ingest on 2026-10-09 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — wwc-rating-1 |
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