Developing indicators that reflect important aspects of school and classroom environments has become central in a nationwide effort to develop comprehensive programs that measure teacher quality and effectiveness. Formulating teacher evaluation policy necessitates accurate and reliable methods for measuring these environmental variables. This…

Broadly conceived, reliability involves quantifying the consistencies and inconsistencies in observed scores. Generalizability theory, or G theory, is particularly well suited to addressing such matters in that it enables an investigator to quantify and distinguish the sources of inconsistencies in observed scores that arise, or could arise, over…

Performed generalizability analyses of expert ratings and computer-produced scores for a computer-delivered performance assessment of physicians' patient management skills. The two automated scoring systems produced scores for the 200 medical students that were approximately as generalizable as those produced by the four expert raters. (SLD)

Two studies, each involving 10 eighth graders,compared the findings from generalizability (G) studies and alternative decision (D) studies for 4 approaches to scoring classroom assessments. In terms of less rater x person variability and higher G and D coefficients, the methods ranked in this order: topic-specific rubric, constrained point,…

Used generalizability theory to assess the variation in school scores across very short test forms that measured mathematics scores in grades 4 and 8. More than 25,000 students took each form of the 3 tests for each grade. Results demonstrate the lack of comparability in school scores across short, nonparallel tests forms and the importance of…