Displaying Group Differences Using Biplots
Abstract:
"Perceptual maps" are among the most commonly used tools for describing and portraying group differences on multiple attributes. The term "perceptual map" is a general one which has been used to refer to a variety of statistical techniques, including discriminant analysis, multidimensional scaling, plots of group means on principal components or factors, and a relatively new technique know as the "biplot." Biplots, unlike most other "mapping" techniques, can be used with many types of data, such as means, percentages, and frequency counts. This report describes the use and interpretation of biplots and describes the relationship of the method to discriminant analysis.
