Claims

BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial

Claim · All claims
Evidence · 1 study · causal r? · q4
Currency · newest study 2023 · 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.

q4 i? In a multi-site student-level randomized trial across six high schools (n = 1,631), BARR showed a small but statistically significant positive impact on NWEA MAP math outcomes (effect size = +0.08). → 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 multi-site student-level randomized trial in six high schools in Maine, California, and Minnesota found "a small but statistically significant positive impact on math outcomes measured by NWEA MAP (effect size = +0.08)". The sample was 67% African American, 10% English learners, 13% special education, 72% free or reduced-price lunch.

"A multi-site student-level randomized trial conducted in six high schools in Maine, California, and Minnesota (n = 1,631; 67% African American, 10% English learners, 13% special education, 72% free or reduced-price lunch) found a small but statistically significant positive impact on math outcomes measured by NWEA MAP (effect size = +0.08)."

Discussion

Page metadata
Field Value
type claim
id barr-multisite-rct-map-math-es-008
title BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial
description BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial
status review
evidence_strength moderate
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

Frontmatter is the page's machine-readable record — see the Schema & Guide.