Claims

Across three studies of Achieve3000 (35,070 students), the average effect size was 0.00

Claim · All claims
Evidence · 1 study · quant-synthesis r? · q2 · i0 negligible
Currency · newest study 2021 · 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.

q2 i0 The average effect size across all studies of Achieve3000 was 0.00, with one additional small study and a very large study finding no differences. → Achieve3000 2021

Evidence

Achieve3000 2021

Achieve3000. (2021). Achieve3000 evidence rating and program description. https://www.achieve3000.com

q2 · i0 · quant-synthesis · r?

The Program Outcomes summary reports three studies with 35,070 students and an "average effect size across all studies was 0.00." One additional small study and a very large study found no differences, offsetting the single positive SRI result.

"However, one additional small study and a very large study found no differences, and the average effect size across all studies was 0.00."

Discussion

Page metadata
Field Value
type claim
id achieve3000-average-effect-size-zero
title Across three studies of Achieve3000 (35,070 students), the average effect size was 0.00
description Across three studies of Achieve3000 (35,070 students), the average effect size was 0.00
status review
evidence_strength moderate
newest_evidence 2021
generated by process:wiki-ingest on 2026-10-09
trust unverified — no one has confirmed this page's content
sources 1 — achieve3000-2021

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