Item response theory


The effect of nonignorable missing data in computerized adaptive test on item fit statistics for polytomous item response models
These studies are conducted based on assumptions under regular conditions for fixed test forms, such as no missing responses and normal distribution of unidimensional ability for a population.
By: Shudong Wang, Hong Jiao
Topics: Computer adaptive testing, Item response theory, Measurement & scaling


Robust IRT scaling: Considerations in constructing item bank from tests across years
This study investigates the impact of three different IRT scaling and equating methods in building an item bank of tests from 23 years of a national licensure exam . The study focuses on several key psychometric issues including scaledriftandequatingerrors.
By: Jungnam Kim, Dong-In Kim, Furong Gao
Topics: Item response theory, Computer adaptive testing, Measurement & scaling


MAP Growth technical report
This technical report is written for measurement professionals and administrators to help evaluate the quality of the MAP Growth assessments.
By: Patrick Meyer
Products: MAP Growth
Topics: Measurement & scaling, Item response theory, Test design


MAP Growth K–2 item fit analysis study
The purpose of this study is to examine the fit of MAP Growth K–2 items involved in a scale alignment study conducted by NWEA to realign the scales underlying the MAP Growth K–2 and MAP Growth 2–5 Reading and Mathematics tests.
By: Wei He
Topics: Item response theory


MAP Growth K-2 item fit analysis study: A follow-up study
This is a follow-up analysis to the May 2019 item fit analysis study to evaluate the fit of the items whose item difficulties were adjusted in the more recent 2020 follow-up scale alignment study.
By: Wei He
Products: MAP Growth
Topics: Item response theory


Calibration of Spanish MAP Growth Math tests
The calibration study was conducted to investigate the consequences of replacing the English MAP Growth Mathematics item parameters with the Spanish mathematics item parameters.
By: Shudong Wang, Xueming (Sylvia) Li
Products: MAP Growth, MAP Spanish


Automated item generation (AIG): A future for more equitable measurement
This presentation summarizes the work that’s been done at NWEA to implement automated item generation (AIG), in addition to traditional approaches, to leverage the future.
By: Mary Ann Simpson, Sarah Miller, Sylvia Scheuring, Abby Javurek, Jake McMillen, Emily Bo
Topics: Item response theory