Eric J. Beh - An Introduction to Correspondence Analysis

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Master the fundamentals of correspondence analysis with this illuminating resource An Introduction to Correspondence Analysis Written in three parts, the book begins by offering readers a description of two variants of correspondence analysis that can be applied to two-way contingency tables for nominal categories of variables. Part Two shifts the discussion to categories of ordinal variables and demonstrates how the ordered structure of these variables can be incorporated into a correspondence analysis. Part Three describes the analysis of multiple nominal categorical variables, including both multiple correspondence analysis and multi-way correspondence analysis.
Readers will benefit from explanations of a wide variety of specific topics, for example:
Simple correspondence analysis, including how to reduce multidimensional space, measuring symmetric associations with the Pearson Ratio, constructing low-dimensional displays, and detecting statistically significant points Non-symmetrical correspondence analysis, including quantifying asymmetric associations Simple ordinal correspondence analysis, including how to decompose the Pearson Residual for ordinal variables Multiple correspondence analysis, including crisp coding and the indicator matrix, the Burt Matrix, and stacking Multi-way correspondence analysis, including symmetric multi-way analysis Perfect for researchers who seek to improve their understanding of key concepts in the graphical analysis of categorical data,
will also assist readers already familiar with correspondence analysis who wish to review the theoretical and foundational underpinnings of crucial concepts.

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The right of Eric J. Beh and Rosaria Lombardo to be identified as the authors of this work has been asserted in accordance with law.

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Library of Congress Cataloging-in-Publication Data

Names: Beh, Eric J., author. | Lombardo, Rosaria, author.

Title: An introduction to correspondence analysis / Eric J. Beh, Rosaria Lombardo.

Description: Hoboken, NJ : Wiley, 2021. | Includes bibliographical references and index.

Identifiers: LCCN 2020034475 (print) | LCCN 2020034476 (ebook) | ISBN 9781119041948 (cloth) | ISBN 9781119041962 (adobe pdf) | ISBN 9781119041979 (epub)

Subjects: LCSH: Correspondence analysis (Statistics)

Classification: LCC QA278.5 .B43 2021 (print) | LCC QA278.5 (ebook) | DDC 519.5/37–dc23

LC record available at https://lccn.loc.gov/2020034475

LC ebook record available at https://lccn.loc.gov/2020034476

Cover Design: Wiley

Cover Image: © Giovanna Lombardo, p.zza Giovanni XXIII, Castellammare di Stabia (NA) Italy

To Rosey and Alex

To Donato, Renato and Andrea …

for your patience, support and always being there

Eric J. Beh & Rosaria Lombardo

In memory of two pioneers

Jean-Paul Benzecri (1932–2019)

and

John Clifford Gower (1930–2019)

May your legacy live on

Preface

In the late 2000’s we embarked on a rather ambitious project to write a book that covered an extensive array of topics on correspondence analysis. This work resulted in the publication in 2014 of Correspondence Analysis: Theory, Practice and New Strategies . The attempt in that book was to provide a comprehensive technical, computational, theoretical and practical description of a variety of correspondence analysis techniques. These focused largely on the analysis of nominal and ordinal categorical variables with a symmetric and asymmetric association structure. We not only described these techniques for two variables but also discussed how they can be used and adapted for analysing multiple categorical variable.

Irrespective of the benefits and faults of that book, we attempted to give an extensive number of different perspectives. While our general flavour may be more in line with the French approach to correspondence analysis we also tried to approach our discussion by incorporating the British/American conventions of categorical data analysis commonly seen throughout the world. A priority we had was to not just provide a synthesis of a broad amount of the correspondence analysis literature from all around the world but to also discuss the role that the origin of categorical data analysis had on the development of correspondence analysis.

From writing the 2014 book we quickly realised that it may contain too much information for someone who was not well versed in some of the more subtle or obscure aspects of correspondence analysis. We also became aware that some didn’t feel the need to wade through an extensive literature review and technical discussion, but instead wished to focus on the key features of the analysis. So, after taking some time to take a deep breath and stretch our collective muscles, we dived back into writing again to focus on a book with more of an introductory, or tutorial, flavour than the first book allowed. This book is the result of those deep breaths and muscle stretches.

There are many contributions in the statistics, and allied, literature that provide an introduction to correspondence analysis. However many of these focus primarily on the classical approaches that have been around for decades and deal, for the most part, with the visual depiction of the association between nominal variables. Many of these contributions are also discipline specific so that the terminology used, and the application made, are in terms of a particular data or area of research. Michael Greenacre’s book Correspondence Analysis in Practice , which is now in its third edition (as of 2017) provides an excellent introductory description of correspondence analysis. Despite the excellent discussion of a wide range of topics, his book focuses on nominal categorical variables and so deals with the more traditional approaches to performing correspondence analysis.

What makes this book distinctive is that we don’t just introduce how to perform correspondence analysis for two or more nominal categorical variables using the traditional techniques. This book also provides some introductory remarks on the theory and application of non-symmetrical correspondence analysis; a variant that accommodates for a predictor variable and a response variable. We also provide an introduction to how ordered categorical variables can be incorporated into the analysis. For the analysis of multiple nominal categorical variables we do give an introduction to the classical approaches to multiple correspondence analysis (which involve transforming a multi-way contingency table into a two-way form) but we also provide some introductory remarks and an application of multi-way correspondence analysis; a technique which preserves the hyper-cube format of a multi-way contingency table. For the sake of simplicity though, we restrict our attention to the analysis of three variables, but we do examine how to analyse their association when two of them are treated as a predictor variable and the third variable is treated as a response variable.

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