PLS regression, PLS path modeling and generalized Procrustean analysis: A combined approach for multiblock analysis

  • Tenenhaus M
  • Vinzi V
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Abstract

A situation where J blocks of variables are observed on the same set of individuals is considered in this paper.Afactor analysis logic is applied to tables instead of variables. The latent variables of each block should well explain their own block and, at the same time, the latent variables of same order should be as positively correlated as possible to improve interpretation. The paper first (1) reviews the main methods for multiblock analysis based on a criterion to be optimized, (2) describes the hierarchical PLS path modeling algorithm and (3) recalls that it allows one to recover some usual multiblock analysis methods. It is then supposed that the number of latent variables can be different from one block to another and that these latent variables are orthogonal. PLS regression and PLS path modeling are used for this situation. The relation between Horst’s generalized canonical correlation analysis and generalized Procrustean analysis for this specific application is also studied. The approach is illustrated by an example from sensory analysis.

Author-supplied keywords

  • Generalized Procrustean analysis
  • Generalized canonical correlation analysis
  • Multiblock analysis
  • PLS path modeling
  • PLS regression

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Authors

  • Michel Tenenhaus

  • Vincenzo Esposito Vinzi

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