A number of higher order cognitive skills are used in the task of evaluating arguments. Such skills should be assessed because the ability to evaluate arguments is an important one in all subject areas. In addition, it seems reasonable to assume that these evaluative skills will be representative of those required by other cognitively demanding…

Presents an experimental primary trait rubric designed to assess a writer's support for an argument, and structured as an eleven-cell grid on which a rater can plot a student's score. Describes the grid, and its use in a study of 1,892 eleventh-grade essays. Also describes ways to use the grid to teach invention and arrangement. (JG)