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A scalar product model for the multidimensional scaling of choice

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Abstract

A multidimensional scaling analysis is presented for replicated layouts of pairwise choice responses. In most applications the replicates will represent individuals who respond to all pairs in some set of objects. The replicates and the objects are scaled in a joint space by means of an inner product model which assigns weights to each of the dimensions of the space. Least squares estimates of the replicates' and objects' coordinates, and of unscalability parameters, are obtained through a manipulation of the error sum of squares for fitting the model. The solution involves the reduction of a three-way least squares problem to two subproblems, one trivial and the other solvable by classical least squares matrix factorization. The analytic technique is illustrated with political preference data and is contrasted with multidimensional unfolding in the domain of preferential choice.

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Authors and Affiliations

  1. Oregon Research Institute, USA

    Gordon G. Bechtel

  2. University of Illinois, USA

    Ledyard R Tucker

  3. University of Oregon and Oregon Research Institute, USA

    Wei-Ching Chang

Authors
  1. Gordon G. Bechtel
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  2. Ledyard R Tucker
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  3. Wei-Ching Chang
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Additional information

The present work was initiated at Oregon Research Institute under National Institute of Mental Health Grant MH 12972. It was reformulated and completed while the first author was a Visiting Research Fellow at Educational Testing Service.

Presently at the Department of Mathematics, University of Toronto.

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Bechtel, G.G., Tucker, L.R. & Chang, WC. A scalar product model for the multidimensional scaling of choice. Psychometrika 36, 369–388 (1971). https://doi.org/10.1007/BF02291364

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  • DOI: https://doi.org/10.1007/BF02291364

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