Item fit findings were the same regardless of whether the AllYr or LatestYr response sample was used¶
Claim · All claims
Evidence · 1 study · designr2·q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2023: tool and model accuracy changes quickly
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 i? The same fit findings were observed for both the AllYr sample (all exposure years Fall 2015–Fall 2020) and the LatestYr sample (Fall 2019–Fall 2020). → He 2020
Evidence¶
He 2020¶
He, W. (2020). MAP Growth K–2 item fit analysis: A follow-up study. NWEA. https://www.nwea.org/research/publication/map-growth-k-2-item-fit-analysis-study-a-follow-up-study/
q2 · i? · design · r2
Comparison of results across the two samples defined in the study (AllYr and LatestYr); the report also states "The same findings were observed for both Reading and Mathematics" for the summary statistics.
"The same finding was observed regardless of the sample, so only the scatterplots from the AllYr sample are presented in the report."
Discussion¶
Related Claims¶
- Only about half of misfit items were flagged in common by the AllYr and LatestYr samples, which the authors found surprising — reports the opposite
- Adjusting MAP Growth K–2 item difficulties improved item fit, with old infit and outfit statistics more scattered than new ones in both samples — related
- At least 97.5% of Reading items and 92.5% of Mathematics items passed the fit check, with 7 Reading and 23 Mathematics items flagged for misfit — related
- Mathematics items showed more variation in fit statistics than Reading items, and outfit statistics varied more than infit statistics — related
- New and old fit statistics are highly correlated after difficulty adjustment, with outfit correlations near 0.99 for Mathematics and infit correlations around 0.7 for Mathematics and mid-to-high 0.8–0.9 for Reading — related
- New and old fit statistics are moderately correlated, with Pearson coefficients mostly between 0.50 and 0.79 — related
- Adjusting MAP Growth K–2 item difficulties in the 2020 scale alignment study improved item fit, with the largest gains in outfit statistics for difficult Mathematics items — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
map-k2-fit-findings-sample-invariant |
title |
Item fit findings were the same regardless of whether the AllYr or LatestYr response sample was used |
description |
Item fit findings were the same regardless of whether the AllYr or LatestYr response sample was used |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2020 |
recheck_by |
2023 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — he-2020 |
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