Category Archives: Praxes

My job as a Quantitative Analyst at the Minnesota Department of Education requires me to “provide evaluation, statistical, and psychometric support to the Division of Research and Assessment through the entire process of design, development, and reporting to the Minnesota … Continue reading →

Bob Williams recently posted a question to EVALTALK about open source software for plotting survey responses in three dimensions: I’m wondering how to display Likert scale data in three dimensions (ie the Likert scores for each subject on 3 scale … Continue reading →

Following Douglas Bates’ advice for those required to produce p-values for fixed-effects terms in a mixed-effects model, I wrote a function to perform a likelihood ratio test for each term in an lmer() object. Bates has championed the notion that … Continue reading →

Just to show that I’m not the biggest slacker-blogger on the Web, I want to direct you to my guest-post on AEA365: A tip-a-day by and for evaluators. I chose my “tip” because I think structural equation modeling (SEM) and … Continue reading →

I think I have settled on a dissertation topic: spatiotemporal piecewise regression evaluation. Spatiotemporal piecewise regression (SPR) refers to the analysis of longitudinal data from a spatial regression discontinuity (SRD) design with multiple pre-test observations. SRD offers a way to … Continue reading →