Demographic information collected on surveys is often of certain interest to those who use these surveys to measure customer satisfaction or do market research. This thesis presents a method for imposing a dichotomous incidence variable, possibly a demographic variable, on the weighting of items in a set of successive-categories (rating) data using dual scaling. The idea is to augment the matrix of rating data with the "criterion variable" containing the dichotomous information so that this item determines one of the initial solutions of the dual scaling analysis. In conjunction with the augmentation of the criterion item, the original data are "centered" between two numbers that represent the two criterion groups. The resulting modified data matrix is then subjected to a dual scaling analysis. The procedure is discussed with practical guidelines for its use and interpretation of results. Examples of application involve both fabricated and actual data.
Library of Congress Subject Headings
Discriminant analysis; Multivariate analysis; Incidence functions; Correspondence analysis (Statistics); Demographic surveys--Statistics
Department, Program, or Center
Center for Materials Science and Engineering
Wyse, Adam, "A procedure for imposing a dichotomous incidence variable on the weighting of items in a dual scaling analysis of successive-categories (rating) data" (2005). Thesis. Rochester Institute of Technology. Accessed from
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