Dr. Xinhui (Maggie) Xiong

Nexus assessment consulting
Educational Measurement • Psychometrics • AI-Driven Assessment Solutions

Contact: [email protected]

Let's Connect
Whether you're developing a new assessment program, modernizing an existing testing system, or seeking expert guidance on psychometric, AI, or data analytics solutions, I'd welcome the opportunity to discuss your project.
LinkedIn: https://www.linkedin.com/in/xinhui-maggie-x-700456a8/

Helping organizations design reliable, valid, fair, and legally defensible assessments through evidence-based psychometric consulting.

I partner with certification organizations, healthcare testing programs, educational institutions, government agencies, and assessment vendors to develop innovative, defensible, and data-driven assessment solutions that improve decision making and strengthen testing programs.

Who I Work With
I collaborate with organizations responsible for high-stakes assessment, including:
• Certification and credentialing organizations
• Healthcare licensure and certification programs
• State education agencies
• Universities and higher education institutions
• Testing companies and assessment vendors
• Professional associations
• Workforce and talent assessment organizations

About
Dr. Xinhui Xiong is an educational measurement and psychometric consultant with more than 16 years of experience designing, evaluating, and improving assessment programs across education, healthcare, certification, and professional licensure.
Her expertise spans the full assessment lifecycle, from job analysis and assessment design to psychometric analysis, standard setting, equating, computer adaptive testing (CAT), automated test assembly (ATA), and AI-enhanced assessment systems.
Dr. Xiong holds a Ph.D. in Psychometrics from Fordham University, a Master of Liberal Arts in Management from Harvard University, and a master's degree in Computer Science. She combines deep psychometric expertise with artificial intelligence and advanced analytics to help organizations build scalable, efficient, and defensible assessment systems.

Consulting Services
Assessment Design & Test Development
Design certification, licensure, educational, and workforce assessments aligned with professional standards and organizational goals.
Psychometric Analysis
Comprehensive Classical Test Theory (CTT) and Item Response Theory (IRT) analyses to support reliability, validity, fairness, and defensibility.
Certification & Licensure Programs
Support every stage of credentialing exam development, including job analysis, blueprint development, item banking, test assembly, and technical documentation.
Validity & Validation Studies
Develop validity evidence supporting intended score interpretations and appropriate test use.
Standard Setting
Design and facilitate Angoff, Bookmark, Hofstee, and other evidence-based standard-setting studies.
Equating & Scale Maintenance
Maintain score comparability across administrations using modern equating methodologies.
Computer Adaptive Testing (CAT)
Develop adaptive testing solutions that improve measurement precision while reducing testing time.
Automated Test Assembly (ATA)
Create optimized test forms that satisfy content, psychometric, and security specifications.
AI-Enhanced Assessment Solutions
Integrate artificial intelligence into item development, scoring, content review, and assessment workflows while maintaining psychometric rigor and human oversight.
Fairness & DIF Analysis
Evaluate assessments for bias and subgroup differences to support equitable testing practices.
Test Security & Quality Assurance
Develop statistical monitoring, security analytics, and quality assurance procedures that protect assessment integrity.
Training & Professional Development
Deliver customized workshops on psychometrics, educational measurement, AI applications, assessment design, and best practices.
Assessment Program Evaluation
Review existing testing programs and provide strategic recommendations for continuous improvement.

Why Clients Work With Me
• 16+ years of experience in educational measurement and psychometrics
• Leadership experience as a Chief Psychometrician
• Expertise across certification, licensure, healthcare, and K–12 assessment
• Deep experience with both psychometric science and modern AI technologies
• Author of books and peer-reviewed publications
• Frequent presenter at national and international conferences
• Proven leader of multidisciplinary psychometric and analytics teams

Representative Projects
Examples of previous work include:
• Certification examinations
• Professional licensure assessments
• Healthcare credentialing programs
• Statewide K–12 assessment systems
• Standard-setting studies
• Job and practice analyses
• Item Response Theory (IRT) modeling
• Automated test assembly
• Computer adaptive testing
• Scale maintenance
• Validity studies
• Fairness and DIF analyses

Publications
Selected books, peer-reviewed journal articles, conference presentations, and invited workshop:
• Xiong X., Shermis M., and Xiong J. (Eds.). The Role of AI in Assessment: Revolutionizing Education. Routledge. 2026. ISBN 9781041028031.• Xiong, X. (2026 May). A comparative study of traditional, variational and neural estimation methods for IRT. Invited presentation, Department of Statistics, University of Illinois Urbana-Champaign.
• Xiong X., Shermis M. (2026, April). Beyond the Bubble Sheet: Shaping the Future of Assessment with AI. Workshop organizer and instructor at the Annual Meeting of AERA, Los Angeles, LA.
• Xiong X., Eseryel D. (2026). “Measuring Learning Through Play: AI-Enabled Game-Based Assessment” In “The Role of AI in Assessment: Revolutionizing Education”, edited by Xiong X., Shermis M. and Xiong J.. Routledge, 2026.
• Xiong, X. (2025, Oct.). Scalable and explainable AI with SQL-Augmented Retrieval. Paper presented at the AMIE-NCME, Pittsburg, PA.