- An example dataset is analyzed and the results used to demonstrate that a cross-grade (vertical) scale can be developed for an assessment for which the dimension being measured varies somewhat from...
Weighting Subtests or Subsets of Test Items in Scoring.
- I use a generalization of Pythagoras's theorem to explain the consequences of weighting in combining part scores or item scores. I use a geometric explanation.
On Variance Contributions in Regression Models
- When regression models incorporate predictors that are correlated there is no unique way of defining the contribution of each predictor to the overall prediction. This fact is demonstrated using a ...
Methods of developing a cross-grade scale in educational assessment.
- Describes designs for scaling assessments,and appropriate statistical procedures, across grade levels in schools .