LEAP Lab
The LEAP (Learning, Exploring, and Advancing Psychometrics) Lab was established in 2021 and is located in the Mary Frances Early College of Education at the University of Georgia. We are a team of researchers interested in psychometrics, educational measurement and assessment, and quantitative methodologies with a focus on applications in educational research. We emphasize the L-E (learning and exploring) in all lab activities including applied and methodological research, qualitative field work, professional development, conference travel, and interviews with various scholars. Contact me if you are interested in getting involved with the lab.
Lab Members
Name: Matthew Madison (Lab director; he/him/his)
Research interests: diagnostic measurement, longitudinal measurement, K - 12 assessment
Hobbies: basketball, golf, exercise, true crime
Contact: mjmadison@uga.edu
Name: Sergio Haab (he/him/his)
Education: B.S. Statistics (University of Georgia)
Program: M.A. in Quantitative Methodology
Research Interests: psychometrics, item response models
Hobbies: dance, martial arts, soccer, Dungeons and Dragons
Contact: sergio.haab@uga.edu
Name: Lientje Maas (she/her/hers)
Education: BSc in Psychology & Mathematics, MSc Methodology and Statistics (Utrecht University)
Program: Ph.D. in Quantitative Methodology (Visiting from Utrecht University)
Research Interests: diagnostic measurement, formative assessment, statistics education
Hobbies: running, cycling, traveling, coffee
Contact: j.a.m.maas@uu.nl
Name: Al Moore (he/him/his)
Education: B.S. Statistics (University of Georgia)
Program: M.A. in Quantitative Methodology
Research Interests: diagnostic classification models, retrofitting, longitudinal diagnostic models
Hobbies: weightlifting, jogging, gaming, Dungeons & Dragons
Contact: acm01415@uga.edu
Name: Armani Morris (she/her/hers)
Education: B.A. Psychology (Spelman College)
Program: M.A. in Quantitative Methodology
Research Interests: educational measurement, students with disabilities, moderation/mediation
Hobbies: dance, cooking, exercising, (just starting) graphic design and YouTube
Contact: armani.morris@uga.edu
Name: Madeline Schellman (she/her/hers)
Education: B.S. Mathematics & Psychology, M.A. Quantitative Methodology (University of Georgia)
Program: Ph.D. in Quantitative Methodology
Research Interests: diagnostic measurement, misconceptions, item development
Hobbies: mixed martial arts, soccer
Contact: mas13@uga.edu
Name: Selay Zor (she/her/hers)
Education: B.S. Mathematics Education (Balıkesir University), M.A. Quantitative Methodology (University of Georgia)
Program: Ph.D. in Quantitative Methodology
Research Interests: diagnostic measurement, item response theory, differential item functioning
Hobbies: traveling, music, movies
Contact: selay.zor25@uga.edu
Lab Projects
Generalized, Multilevel, and Longitudinal Psychometric Models for Evaluating Educational Interventions (2022 – 2025). Institute of Education Sciences.
Doubly Mixture Psychometric Models for Modeling Learning Progressions (2021 – 2023). UGA Faculty Seed Grants.
CT-STEM Pop-Ups4All: An RPP for Agile Learning (2020 – 2024). National Science Foundation.
Native STEM Portraits: A Longitudinal, Mixed-Methods Study of the Intersectional Experiences of Native Learners and Professionals in STEM (2020 – 2025). National Science Foundation.
A Family of Diagnostic Models for Evaluating Learning Progressions (2019 – 2024). National Science Foundation.
Psychometrician and Statistician