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The lavaan tutorial

The lavaan tutorial Yves Rosseel Department of Data Analysis Ghent University (Belgium). July 19, 2021. Abstract If you are new to lavaan , this is the place to start. In this tutorial , we introduce the basic components of lavaan : the model syntax, the fitting functions (cfa, sem and growth), and the main extractor functions (summary, coef, fitted, inspect). After we have provided two simple examples, we briefly discuss some im- portant topics: meanstructures, multiple groups, growth curve models, mediation analysis, and categorical data. Along the way, we hope to give you just enough information to get you started (but no more). Contents 1 Before you start 1. 2 Installation of the package 2. 3 The model syntax 2. 4 A first example: confirmatory factor analysis (CFA) 4. 5 A second example: a structural equation model (SEM) 7.

4 A first example: confirmatory factor analysis (CFA) We start with a simple example of confirmatory factor analysis, using thecfa() function, which is a user-

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