Equipercentile linking with conditional growth norms for deriving assessment cut scores¶
Research Method · All research methods
Evidence · 3 claims (2 for, 1 against) · 2 studies (2 associational),q2· 1 of 2 report an effect size · 3 claims rest on one study
Description¶
The article's methodology combines the equipercentile linking method with NWEA's conditional growth norms. The equipercentile procedure "matches scores on the two scales that have the same percentile rank" to find the RIT equivalent of each state cut score, with polynomial loglinear pre-smoothing applied. Fall and winter cuts are then projected using expected growth gains, and Grade 2 cuts are interpolated from longitudinal Grade 3 cohort data. This framework underlies all state linking studies described.
Accounts¶
- Equipercentile linking with conditional growth norms as the methodology for deriving MAP Growth cut scores: The article's methodology combines the equipercentile linking method with NWEA's conditional growth norms. The equipercentile procedure "matches scores on the two scales that have the same percentile rank" to find the RIT equivalent of each state cut score, with polynomial loglinear pre-smoothing applied. Fall and winter cuts are then projected using expected growth gains, and Grade 2 cuts are interpolated from longitudinal Grade 3 cohort data. This framework underlies all state linking studies described. (Ann Hu (2021))
Claims¶
- MAP Growth RIT scores correlate strongly (r = 0.92–0.93) with state summative mathematics scores in the Minnesota MCA-III linking study [+M]
- MAP Growth spring RIT cut scores classify students as proficient or not proficient on the MCA-III Mathematics test with 0.87–0.90 overall accuracy [+M]
- Linear regression outperformed equipercentile and mean-sigma equating for predicting ARM scores and was selected as the final linking model [-W]
Related Research Methods¶
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Key Sources¶
- Ann Hu, NWEA Psychometric Solutions. (2021). MAP Growth Linking Studies: Intended Uses, Methodology, and Recent Studies. NWEA. https://www.nwea.org/resource/type/linking-studies/
Page metadata
| Field | Value |
|---|---|
type |
research-method |
id |
equipercentile-linking-with-conditional-growth-norms-for-deriving-assessment-cut-scores |
title |
Equipercentile linking with conditional growth norms for deriving assessment cut scores |
description |
The article's methodology combines the equipercentile linking method with NWEA's conditional growth norms. |
status |
review |
moved_from |
theory/equipercentile-linking-conditional-growth-norms-methodology |
generated |
by process:sweep-kinds on 2026-10-10 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — ann-hu-2021 |
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