In the Linkow et al. (2019) scale-up QED, coaching showed no statistically significant effect on cumulative college GPA (effect size 0.01, p = 0.82)¶
Claim · All claims
Evidence · 1 study · causalr2·q2·i0negligible
Currency · newest study 2020 · checked against its sources 2026-10-19 (automated, 1 of 1 entry) · 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 2019 study found intervention students earned a 2.37 cumulative GPA versus 2.36 for comparison students, an effect size of 0.01 and improvement index of 0, not statistically significant (p = 0.82). → What Works Clearinghouse 2020
Evidence¶
What Works Clearinghouse 2020¶
What Works Clearinghouse, Institute of Education Sciences, U.S. Department of Education. (2020). Success Boston Coaching (WWC 2021-001). https://ies.ed.gov/ncee/wwc/InterventionReport/708
q2 · i0 · causal · r2
QED with 814 intervention and 2,739 comparison students matched via propensity score blocking. Table 4 reports GPAs of 2.37 (SD 1.03) versus 2.36 (SD 1.10), effect size 0.01, improvement index 0, p = 0.82; the study is characterized as having an indeterminate effect.
"The finding on the academic achievement domain, which shows evidence of an indeterminate effect, is based on an outcome analysis that includes 3,553 students."
Discussion¶
Related Claims¶
- In the Linkow et al. (2017) QED, coaching produced a statistically significant positive effect on cumulative college GPA — related
- Success Boston Coaching has potentially positive effects on academic achievement, with a significant effect in one study and an indeterminate effect in the other — related
- Success Boston Coaching has potentially positive effects on progressing in college, based on two quasi-experimental studies meeting WWC standards with reservations — related
- In the Linkow et al. (2017) QED, coaching produced a statistically significant positive effect on second-year college enrollment — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
linkow-2019-null-gpa-effect |
title |
In the Linkow et al. (2019) scale-up QED, coaching showed no statistically significant effect on cumulative college GPA (effect size 0.01, p = 0.82) |
description |
In the Linkow et al. |
status |
review |
evidence_strength |
weak |
newest_evidence |
2020 |
source_checked |
2026-10-19 |
generated |
by process:wiki-ingest on 2026-10-09 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2020 |
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