Category Archives: Praxes

One of the things I like about my current job is getting to apply generalizability theory. I have to confess that I didn’t appreciate G theory at first, but now that I’m analyzing data from performance assessments (i.e., ratings of … Continue reading →

I was recently tasked with estimating the reliability of scores composed of items on different scales. The lack of a common scale could be seen in widely varying item score means and variances. As discussed by Graham, it’s not widely … Continue reading →

How do you place Measures of Academic Progress (MAP) Rash unit scores (RITs) on the normal theta metric (and vice versa)? I searched the Web but couldn’t find a straightforward answer. What I’ve gathered from various sources is that RIT … Continue reading →

I was recently given the task of improving the accessibility of a statistical report, with the goal of meeting level AA of the Web Content Accessibility Guidelines 2.0. The report contains about 600 pages of tables and graphs in a … Continue reading →

A good friend of mine told me to check out Beer Advocate online. Their rating system does a good job of balancing simplicity (A-F grades) with thoroughness (measures of central tendency and dispersion). I also appreciate the way it encourages … Continue reading →