Doors to Discovery™ shows potentially positive effects on preschool oral language (PPVT-III effect size 0.27, not statistically significant)¶
Claim · All claims
Evidence · 1 study · causalr1·q3·i1small
Currency · newest study 2013 · 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 In one randomized controlled trial meeting standards without reservations, Doors to Discovery™ had a substantively important but statistically non-significant positive effect on oral language (effect size 0.27). → Doors to Discovery™ WWC Intervention Report 2013
Evidence¶
Doors to Discovery™ WWC Intervention Report 2013¶
Doors to Discovery™ WWC Intervention Report, U.S. Department of Education, What Works Clearinghouse. (2013). Doors to Discovery™ Intervention Report, Early Childhood Education. https://ies.ed.gov/ncee/wwc/InterventionReport/153
q3 · i1 · causal · r1
Randomized controlled trial in four Head Start classrooms (37 children; 21 intervention, 16 comparison), with the WWC computing effects from child-level data. The PPVT-III effect size was 0.27 (improvement index +11), "not statistically significant" but substantively important; WWC-computed p-value 0.63.
"WWC analyses of the Christie et al. (2003) data show that the effect for the PPVT-III is not statistically significant, but large enough (0.27) to be considered substantively important according to WWC criteria"
Discussion¶
Related Claims¶
- Doors to Discovery™ shows no discernible effects on preschool math (domain-average effect size 0.01) — related
- Doors to Discovery™ shows no discernible effects on preschool phonological processing (effect size 0.14, not significant) — related
- Doors to Discovery™ shows potentially positive effects on preschool print knowledge, with mixed findings across two studies — related
- Everyday Mathematics® has potentially positive effects on mathematics achievement for primary students, with a substantively important but statistically non-significant effect size of 0.27 — related
- Headsprout Early Reading has a statistically significant positive effect on the oral language of at-risk preschool children — related
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Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
doors-to-discovery-potentially-positive-oral-language |
title |
Doors to Discovery™ shows potentially positive effects on preschool oral language (PPVT-III effect size 0.27, not statistically significant) |
description |
Doors to Discovery™ shows potentially positive effects on preschool oral language (PPVT-III effect size 0.27, not statistically significant) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2013 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — doors-to-discovery-wwc-intervention-report-2013 |
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