GET PSYCHO: GlassLab, a educational game studio, has released an extensive, 160-page report on "the formative assessment value of simulation games," using its first game, SimCityEDU, as a case study. (We reviewed the game here.) It dives deep into how "psychometrics" (psychological measurements) can be used to "create probability models that connect students' performance in particular game situations to their skills, knowledge, identities, and value." The full report looks further at how researchers, designers and developers can better design frameworks for game-based assessments and analyze students' gameplay data. It's a little dense, so for the casual GBL enthusiasts, the short summary (PDF) will suffice.