Wei He, PhD
Principal Research Scientist
Wei He develops innovative solutions to enhance existing products such as MAP Growth. Her research is focused on psychometrics, adaptive testing, educational accountability issues, and applied statistics. Her work has been published in peer-reviewed journals such as theJournal of Educational Measurement,Educational and Psychological Measurement, and theInternational Journal of Testing. She is also a frequent presenter at national and international conferences, including NCME, AERA, and IACAT. Dr. He’s publications and presentations cover diverse topics like CAT item selection and item pool design, item field testing and calibration, test equating, missing data treatment, and item equivalence in international assessments. She holds a PhD in measurement and quantitative methods from Michigan State University.
Publications by Wei He
Achievement and Growth Norms for Course-Specific MAP Growth Tests
本报告记录了用于生成一系列特定课程MAP®成长™主题测试的成就和增长用户规范的过程，包括代数1，几何，几何，代数2，Integrated Math I，Integrated Math II，Integrated Math III，Integrated Math III，III，III，III，III，III，III，III，III，III，III，III，III，III，III，III，和生物学/生命科学。在这些测试中，综合数学I，综合数学II，集成数学III和生物学/生命科学是第一次拥有其规范。其余的测试，即代数1，几何和代数2，其规范更新了，包括通过使用较新的测试事件获得更多期间增长规范。使用多变量真实分数模型（Thum＆He，2019）的规范样本选择和基于模型的方法的程序，该因素还详细提供了已知的分数以生成规范的分数，以及成就和增长的快照每个测试的规范。
产品：MAP Growth
Topics:Measurement & scaling
Achievement and growth norms for English MAP Reading Fluency Foundational Skills
This report documents the norming study procedure used to produce the achievement and growth user norms for English MAP Reading Fluency Foundational Skills.
Topics:Measurement & scaling
MAP Growth item parameter drift study
This report documents the results of an item parameter drift study designed to check the parameter stability of MAP Growth items.
产品：MAP Growth
Topics:Computer adaptive testing
An investigation of item parameter invariance using focused calibration samples for MAP Growth
进行了两项研究，以评估现有的MAP增长项目参数估计是否在不同的校准样品中不变。
产品：MAP Growth
Topics:Computer adaptive testing
A comparison of item parameter estimates in Pychometrik and the existing item calibration tool
This study evaluates the performance of Pychometrik, a new item calibration tool, against the existing tool for MAP Growth.
Topics:Item response theory
The report documents the process NWEA followed to determine and validate the cut scores for fall, winter, and spring that can be used to identify students in Grades K–8 who have severe learning difficulties and need intensive intervention in reading and mathematics.
产品：MAP Growth
Topics:指导
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.
产品：MAP Growth
Topics:Item response theory
