Abstract
This study describes the development and evaluation of a report-grading assistance map. The map was designed to visualize scores graded for reports assigned to a class at the university level and their similarities. Initially, the authors reviewed some visualization techniques for text information in this paper by utilizing real report papers written by the university students. The authors then developed and evaluated the report-grading assistance map with a circular cone based on Deerwester et al's technique. The map is a new visualization technique to show the amount of words and word use. The validity of the map was then assessed by the grading of reports using the map by raters as well as responses from a questionnaire survey. The findings showed that raters were able to grade the reports more efficiently by referring to reports graded in advanced using the report-grading assistance map. Furthermore, accuracy of visualization for reports graded A and D was also observed. On the other hand, we observed that such visualization had a cognitive inducing effect to mislead raters and therefore, it is an important aspect to focus upon in our future research.
