Claims

A one-factor unidimensional model is the most reasonable fit for MAP computerized adaptive Reading and Mathematics tests across grades, terms, and ten states, though Michigan Mathematics misses the RMSEA criterion

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 2013 · checked against its sources 2026-10-15 (automated, 1 of 1 entry) · not reviewed by a person · overdue for a recheck since 2016: 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? CFA of goal-level scores shows the one-factor (unidimensional) model is the most reasonable model for MAP tests in the ten studied states; RMSEAs for Michigan Mathematics did not meet the Hu and Bentler criteria. → Shudong Wang 2013

Evidence

Shudong Wang 2013

Shudong Wang, Marty McCall, Hong Jiao, & Gregg Harris. (2013). Construct Validity and Measurement Invariance of Computerized Adaptive Testing: Application to Measures of Academic Progress (MAP) Using Confirmatory Factor Analysis. Journal of Educational and Developmental Psychology, 3(1). https://doi.org/10.5539/jedp.v3n1p88

q2 · i? · associational · r2

CFA (Proc TCALIS, maximum likelihood) on goal scores from MAP Reading and Mathematics tests in ten states, grades 3-9, five academic terms. Fit indexes met Hu and Bentler criteria, and "the one-factor (unidimensional) model is the most reasonable model". Michigan Mathematics RMSEAs were exceptions. In the later test of invariance across grades, RMSEAs and SRMRs for Michigan Mathematics missed the criteria (Table 9: RMSEA 0.08–0.11, SRMR up to 0.14 under the loading-plus-variance constraint), and metric invariance was supported for every test except Michigan Mathematics.

"All values of fit indexes (except RMSEAs for Michigan MAP Mathematics tests) satisfy the Hu and Bentler (1999) criteria and show that each model fits data extremely well for different content areas, grades, terms, and states. Overall results suggest that the one-factor (unidimensional) model is the most reasonable model for MAP tests in these 10 states."

Discussion

Page metadata
Field Value
type claim
id map-cat-unidimensional-factor-structure
title A one-factor unidimensional model is the most reasonable fit for MAP computerized adaptive Reading and Mathematics tests across grades, terms, and ten states, though Michigan Mathematics misses the RMSEA criterion
description A one-factor unidimensional model is the most reasonable fit for MAP computerized adaptive Reading and Mathematics tests across grades, terms, and ten states, though Michigan Mathematics misses the RMSEA criterion
status review
evidence_strength moderate
newest_evidence 2013
source_checked 2026-10-15
recheck_by 2016
generated by process:wiki-ingest on 2026-10-08
trust unverified — no one has confirmed this page's content
sources 1 — shudong-wang-2013

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