This study evaluates the performance of Pychometrik, a new item calibration tool, against the existing tool for MAP Growth.

The calibration study was conducted to investigate the consequences of replacing the English MAP Growth Mathematics item parameters with the Spanish mathematics item parameters.

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.

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.

This technical report is written for measurement professionals and administrators to help evaluate the quality of the MAP Growth assessments.

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.

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.