Claims

Effect sizes for within-grade reading and math growth declined as students progressed from Grade 1 to Grade 5

Claim · All claims
Evidence · 1 study · associational r2 · q3 · i3 large
Currency · newest study 2020 · 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 i3 Reading growth effect sizes fell from g = 1.37 in Grade 1 to g = 0.50 in Grade 5, and math growth fell from g = 1.93 to g = 0.73. → Scammacca Nancy 2020

Evidence

Scammacca Nancy 2020

Scammacca Nancy, Fall Anna-Mária, Capin Philip, Roberts Greg, Swanson Elizabeth (2020). Examining Factors Affecting Reading and Math Growth and Achievement Gaps in Grades 1–5: A Cohort-Sequential Longitudinal Approach. Journal of Educational Psychology. https://doi.org/10.1037/edu0000400

q3 · i3 · associational · r2

Hedges's g effect sizes computed from raw data for growth within each grade across cohorts. The article also reports "more growth occurred from the start of the year to mid-year than from mid-year to end-of-year time points, particularly in math."

"The effect size for reading growth declined from g = 1.37 in Grade 1 to g = 0.50 in Grade 5. In math, growth declined from g = 1.93 to g = 0.73."

Discussion

Page metadata
Field Value
type claim
id growth-effect-sizes-decline-grades-1-5
title Effect sizes for within-grade reading and math growth declined as students progressed from Grade 1 to Grade 5
description Effect sizes for within-grade reading and math growth declined as students progressed from Grade 1 to Grade 5
status review
evidence_strength moderate
newest_evidence 2020
generated by process:wiki-ingest on 2026-10-24
trust unverified — no one has confirmed this page's content
sources 1 — scammacca-nancy-2020

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