English and Spanish MAP Growth Reading scales were statistically linked via a bilingual group design despite measuring similar but not identical constructs¶

Claim · All claims
Evidence · 1 study · design r2 · q2
Currency · newest study 2021 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2024: tool and model accuracy changes quickly

Subclaims¶

q2 i? Because the English and Spanish assessments measure similar but not identical reading constructs, NWEA statistically linked the two scales based on a bilingual group design to allow score comparisons across languages and create the Spanish vertical scale. → NWEA 2021

Evidence¶

NWEA 2021¶

NWEA. (2021). Spanish MAP Growth Reading Technical Report. https://www.nwea.org/research/publication/spanish-map-growth-reading-technical-report/

q2 · i? · design · r2

Scaling and linking description (Chapter 5) of the Spanish vertical RIT scale. The report states the scales were "statistically linked... based on a bilingual group design" because the two assessments measure "similar but not identical reading constructs," enabling cross-language score comparison.

"English and Spanish MAP Growth Reading assessments measure similar but not identical reading constructs, so NWEA statistically linked the scales of the English and Spanish versions of MAP Growth based on a bilingual group design to allow comparisons of student scores across assessments."

Discussion¶

Related Claims¶

• DIF study finds most items in category A, with C DIF rare (~1%) except for the Native English/Bilingual group (6.66%) — related
• Goodness-of-fit results indicate Spanish MAP Growth Reading constructs are at least tau-equivalent across language background groups — related
• Spanish MAP Growth Reading universal screening cut scores correspond to the 40th percentile of Spanish norms, established by linking to English cut scores — related
• Spanish–English bilinguals performed better on kindergarten mathematics assessments when tested in Spanish — related