Assistant Professor of Educational Statistics and Research Methods, University of Delaware
sanfordstudent.github.io
Sandy Student
In anticipation of IOMW 2025, we’ve posted a preprint of the paper we’ll be discussing there. Take a look! osf.io/preprints/ps...
Wyatt Read presented this work today at the UD Steele Symposium!
Come be my colleague! We are hiring for a TT assistant professor in education statistics and data science. Please get in touch with any questions! careers.udel.edu/cw/en-us/job...
Fun find for the ncme archives committee today!
Out today in BRM!
We investigate the small(er) sample performance of an MCMC method for checking whether item response data produce an interval scale using the Rasch model. These checks are viable at achievable sample sizes in survey research.
Open access: link.springer.com/article/10.3...
Ever wanted to investigate DIF by more than one variable at once? My colleague Ethan McCormick and I have created an NCME ITEMS module on DIF analysis with multiple background variables using moderated nonlinear factor analysis. Take a look! www.ncme.org/itemsportal/...
onlinelibrary.wiley.com/doi/full/10....
Out now! @derekbriggs.bsky.social, Laurie Davis and I investigate differences in how much students appear to grow on a vertical scale based solely on the grade alignment of (a large number of) common items. Turns out, the differences are pretty big!
It’s new article day! Follow the link for updated benchmarks for grade 3-8 annual growth and an investigation of what drives the considerable variability in growth across different scales. doi.org/10.1080/1934...
Wasn’t really sure how to start posting here but it turns out the answer was a boring (well, not to me) methods question: anyone ever fit the 2PL IRT model as a nonlinear mixed effects model using the lme4 R package?
