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ERIC Number: ED310122
Record Type: Non-Journal
Publication Date: 1986
Pages: 57
Abstractor: N/A
Reference Count: N/A
Homogeneity Analysis with k Sets of Variables: An Alternating Least Squares Method with Optimal Scaling Features. Research Report 86-5.
van der Burg, Eeke; And Others
Homogeneity analysis, or multiple correspondence analysis, is usually applied to k separate variables. In this paper, it is applied to sets of variables by using sums within sets. The resulting technique is referred to as OVERALS. It uses the notion of optimal scaling, with transformations that can be multiple or single. The single transformations consist of three types: (1) nominal; (2) ordinal; and (3) numerical. The corresponding OVERALS computer program minimizes a least squares loss function by using an alternating least squares algorithm. Many existing linear and non-linear multivariate analysis techniques are shown to be special cases of OVERALS. Disadvantages of the OVERALS method include the possibility of local minima in some complicated special cases, a lack of information on the stability of results, and its inability to handle incomplete data matrices. Means of dealing with some of these problems are suggested (i.e., an alternating least squares algorithm to solve the minimization problem). An application of the method to data from an epidemiological survey is provided. A 39-item list of references, three data tables, and 11 graphs are included. (Author/TJH)
Mediatheek, Faculteit Toegepaste Onderwijskunde, Universiteit Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Publication Type: Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: Institute for Road Safety Research in Leidschendam (Netherlands).
Authoring Institution: Twente Univ., Enschede (Netherlands). Dept. of Education.