In a large multi-site cluster randomized study, BARR improved PSAT/NMSQT math scores in one cohort but the second cohort performed similarly to comparison students¶
Claim · All claims
Evidence · 1 study · causalr?·q4
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person
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Reading the evidence codes
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q4 i? A large multi-site cluster randomized study across two cohorts of high schools in 12 states and the District of Columbia found a positive effect on PSAT/NMSQT math scores in one cohort (effect size = +0.14), while the second cohort performed similarly to the comparison students. → Building Assets Reducing Risks (BARR) — Evidence Rating 2023
Evidence¶
Building Assets Reducing Risks (BARR) — Evidence Rating 2023¶
Building Assets Reducing Risks (BARR) — Evidence Rating. (2023). https://www.barrcenter.org
q4 · i? · causal · r?
A large multi-site cluster randomized study across two cohorts of high schools in 12 states and the District of Columbia (n = 3,443 and n = 3,829) found "a positive effect on PSAT/NMSQT math scores in one cohort (effect size = +0.14)". The second cohort "performed similarly to the comparison students"; the outcome measure differed from the NWEA MAP trials.
"A large multi-site cluster randomized study across two cohorts of high schools in 12 states and the District of Columbia (n = 3,443 and n = 3,829; 66% African American, 16% English learners, 15% special education, 64% free or reduced-price lunch) found a positive effect on PSAT/NMSQT math scores in one cohort (effect size = +0.14), while the second cohort performed similarly to the comparison students."
Discussion¶
Related Claims¶
- A large multi-site cluster randomized study found a positive PSAT/NMSQT reading effect in one cohort (+0.13) but a smaller effect in a second cohort (+0.03) — related
- BARR reduces ninth-grade chronic absenteeism in a large school-level randomized study — related
- BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial — related
- BARR improves reading achievement across grades 7–12 with an average effect size of +0.08 across three randomized studies — related
- BARR produces a larger statistically significant effect on NWEA MAP math scores in a single-school student-level randomized study, stronger for struggling students — related
- Software product effects changed between the first and second year of the study, warranting cohort-level comparison of effectiveness — related
- A multi-site randomized controlled trial found Woot Math's adaptivity contributed significant effects in learning and retention
- Two student-level randomized studies in California, Maine, and Minnesota high schools found significant positive impacts on NWEA MAP reading (average effect size +0.09) — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
barr-cluster-randomized-psat-math-mixed-cohorts |
title |
In a large multi-site cluster randomized study, BARR improved PSAT/NMSQT math scores in one cohort but the second cohort performed similarly to comparison students |
description |
In a large multi-site cluster randomized study, BARR improved PSAT/NMSQT math scores in one cohort but the second cohort performed similarly to comparison students |
status |
review |
evidence_strength |
mixed |
newest_evidence |
2023 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — building-assets-reducing-risks-barr-evidence-rating-2023 |
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