Red Light, Purple Light shows uncertain effects on reading and literacy related achievement¶
Claim · All claims
Evidence · 1 study · quant-synthesisr1·q3
Currency · newest study 2022 · 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? The findings for the reading and literacy related domain were not statistically significant across the two studies. → What Works Clearinghouse 2022
Evidence¶
What Works Clearinghouse 2022¶
What Works Clearinghouse, Institute of Education Sciences, U.S. Department of Education. (2022). Red Light, Purple Light. https://ies.ed.gov/ncee/wwc/InterventionReport/725
q3 · i? · quant-synthesis · r1
WWC synthesis of the reading and literacy related domain across two qualifying studies with 433 children, both using Woodcock-Johnson III Letter-Word Identification subtests. The report states "The research does not support claims that Red Light, Purple Light improved student reading and literacy related achievement."
"The research does not support claims that Red Light, Purple Light improved student reading and literacy related achievement. This assessment is based on two studies that meet WWC standards."
Discussion¶
Related Claims¶
- Red Light, Purple Light has potentially positive effects on preschool children's self-regulation, with moderate evidence — related
- Red Light, Purple Light shows uncertain effects on preschool language outcomes — possibly the same claim (merge candidate)
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
red-light-purple-light-uncertain-reading-literacy |
title |
Red Light, Purple Light shows uncertain effects on reading and literacy related achievement |
description |
Red Light, Purple Light shows uncertain effects on reading and literacy related achievement |
status |
review |
evidence_strength |
weak |
newest_evidence |
2022 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2022 |
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