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Warsaw 2009: Presentations and short courses

Some important considerations while testing for misspecifications in SEM

Session: Testing Structural Equations Models

Author:

Willem E. Saris; Universitat Pompeu Fabra, Spain

Abstract:

Recently we have made a proposal to directly test for misspecifications in SEM (Saris et al 2009). Although we think that this approach has considerable advantages above the global tests and fit measures, normally suggested, there are also problems connected with this direct method. To mention some: firstly, one will get a large number of suggestions for misspecifcations of which some can be significant by chance; secondly the suggestions are conditional on the starting model ; thirdly, the estimates of the modification indices can be highly correlated. These issues play also a role if one wants to use this information to correct the models. It is this type of problems and the solutions of these problems we will discuss in the presentation.