4.2 Article

Partial least squares as a tool for scientific inquiry: comments on Cadogan and Lee

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EUROPEAN JOURNAL OF MARKETING
卷 57, 期 6, 页码 1737-1757

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EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/EJM-06-2021-0416

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PLS; PLS-SEM; Latent variables; Emergent variables; Composite model Mode A; Structural equation modeling; Constructivism; Pragmatism; Instrumentalism; Scientific realism

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This paper critically evaluates the claims of Cadogan and Lee (2022) regarding the suitability of PLS for scientific studies. It argues that it is not PLS itself that subverts the realist search for truth, but some proponents of the PLS-SEM framework. The paper provides recommendations for researchers using structural equation models, emphasizing the importance of being conscious of different research paradigms, selecting appropriate statistical models, and critically evaluating models.
Purpose In their paper titled A Miracle of Measurement or Accidental Constructivism? How PLS Subverts the Realist Search for Truth, Cadogan and Lee (2022) cast serious doubt on PLS's suitability for scientific studies. The purpose of this commentary is to discuss the claims of Cadogan and Lee, correct some inaccuracies, and derive recommendations for researchers using structural equation models. Design/methodology/approach This paper uses scenario analysis to show which estimators are appropriate for reflective measurement models and composite models, and formulates the statistical model that underlies PLS Mode A. It also contrasts two different perspectives: PLS as an estimator for structural equation models vs. PLS-SEM as an overarching framework with a sui generis logic. Findings There are different variants of PLS, which include PLS, consistent PLS, PLSe1, PLSe2, proposed ordinal PLS and robust PLS, each of which serves a particular purpose. All of these are appropriate for scientific inquiry if applied properly. It is not PLS that subverts the realist search for truth, but some proponents of a framework called PLS-SEM. These proponents redefine the term reflective measurement, argue against the assessment of model fit and suggest that researchers could obtain confirmation for their model. Research limitations/implications Researchers should be more conscious, open and respectful regarding different research paradigms. Practical implications Researchers should select a statistical model that adequately represents their theory, not necessarily a common factor model, and formulate their model explicitly. Particularly for instrumentalists, pragmatists and constructivists, the composite model appears promising. Researchers should be concerned about their estimator's properties, not about whether it is called PLS. Further, researchers should critically evaluate their model, not seek confirmation or blindly believe in its value. Originality/value This paper critically appraises Cadogan and Lee (2022) and reminds researchers who wish to use structural equation modeling, particularly PLS, for their statistical analysis, of some important scientific principles.

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