Restricted item pools show higher item use rates than all-grade pools, and use rates drop sharply for off-grade simulees¶
Claim · All claims
Evidence · 1 study · causalr2·q2
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
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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? In mathematics tests, item use was higher with the on-grade pool (mean 53.7%) than the ±1-grade (46.3%) or all-grade (39.5%) pools, and use rates were relatively lower in simulations with off-grade simulees. → Li 2019
Evidence¶
Li 2019¶
Li, S., & Meyer, J. P. (2019). Simulation study for evaluating MAP® Growth™ grade-level item pools. Portland, OR: NWEA. https://www.nwea.org/research/publication/simulation-study-for-evaluating-map-growth-item-pools-with-grade-level-constraints/
q2 · i? · causal · r2
Pool utilization analysis (Appendix D) of the percentage of pool items administered per condition. Reading followed a similar pattern (48.4% vs 43.3% vs 37.1%); language usage had the highest rates (60.8% vs 53.9% vs 42.3%). Off-grade conditions showed much lower use (e.g., mathematics 23.6%, 21.1%, 25.1%).
"In mathematics tests, the degree of item use is higher with the on-grade item pool (mean=53.7%) than for the ±1-grade item pool (mean=46.3%) or all-grade item pool (mean=39.5%)."
Discussion¶
Related Claims¶
- On-grade item pools cause content balancing failures for off-grade-ability students, while all-grade pools improve balancing and language usage tests remained balanced throughout — related
- Testing students with off-grade ability using on-grade item pools substantially diminishes measurement precision compared with all-grade pools — related
- Bias and RMSE of ability estimates are larger for on-grade item pools than for ±1-grade and all-grade pools across content areas and simulee types — related
- On-grade mathematics item pools yield larger SEMs and lower efficiency than all-grade pools for on-grade students, especially at the low end of the scale — related
- Reading SEMs exceed those in mathematics under all pool types, and only the all-grade reading pool meets the operational SEM stopping rule on average — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
pool-utilization-higher-restricted-pools |
title |
Restricted item pools show higher item use rates than all-grade pools, and use rates drop sharply for off-grade simulees |
description |
Restricted item pools show higher item use rates than all-grade pools, and use rates drop sharply for off-grade simulees |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2019 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — li-2019 |
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