The treatment effect on domain-specific reading comprehension was indirect-only: the direct path from treatment to comprehension was not significant¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2024 · 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 i? The direct effect of the intervention on domain-specific reading comprehension scores was not statistically significant, while the total indirect effect through vocabulary was significant. → Mosher 2024
Evidence¶
Mosher 2024¶
Mosher, D. M., Burkhauser, M. A., & Kim, J. S. (2024). Improving second-grade reading comprehension through a sustained content literacy intervention: A mixed-methods study examining the mediating role of domain-specific vocabulary. Journal of Educational Psychology, 116(4), 550–568. https://doi.org/10.1037/edu0000868
q3 · i? · causal · r2
SEM mediation model in Mplus 7 on the Grade 1–2 cohort (N = 2,156), controlling for baseline MAP reading, demographics, SES, gender, English proficiency, and randomization blocks. The article reports "a null direct effect of the intervention on domain-specific reading comprehension scores" and interprets this as indirect-only mediation.
"With a null direct effect of the intervention on domain-specific reading comprehension scores (𝑏𝑏 = 0.123, 𝑆𝑆𝑆𝑆 = 0.118, 𝑝𝑝 = .295, 𝛽𝛽 = 0.068), our results suggest indirect-only mediation (Zhao et al., 2010)."
Discussion¶
Learner Variables¶
- Reading and Language — outcome: instruction changes it
Related Claims¶
- Grade 1 vocabulary carried the significant mediated pathway, while treatment showed no significant direct path to Grade 2 vocabulary — related
- In an observational path model of at-risk readers, first-grade attention had no significant direct path to third-grade reading comprehension but a significant indirect path through word reading, not listening comprehension — related
- Grade 1 and Grade 2 domain-specific vocabulary knowledge explained 69% of the MORE intervention's treatment effect on Grade 2 domain-specific reading comprehension — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
indirect-only-mediation-null-direct-effect |
title |
The treatment effect on domain-specific reading comprehension was indirect-only: the direct path from treatment to comprehension was not significant |
description |
The treatment effect on domain-specific reading comprehension was indirect-only: the direct path from treatment to comprehension was not significant |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2024 |
generated |
by process:wiki-ingest on 2026-10-23 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — mosher-2024 |
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