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. 2011 Apr 1;76(2):306-317.
doi: 10.1007/s11336-010-9200-6.

OpenMx: An Open Source Extended Structural Equation Modeling Framework

Steven Boker  1 , Michael Neale, Hermine Maes, Michael Wilde, Michael Spiegel, Timothy Brick, Jeffrey Spies, Ryne Estabrook, Sarah Kenny, Timothy Bates, Paras Mehta, John Fox
Affiliations

OpenMx: An Open Source Extended Structural Equation Modeling Framework

Steven Boker et al. Psychometrika. .

Abstract

OpenMx is free, full-featured, open source, structural equation modeling (SEM) software. OpenMx runs within the R statistical programming environment on Windows, Mac OS-X, and Linux computers. The rationale for developing OpenMx is discussed along with the philosophy behind the user interface. The OpenMx data structures are introduced - these novel structures define the user interface framework and provide new opportunities for model specification. Two short example scripts for the specification and fitting of a confirmatory factor model are next presented. We end with an abbreviated list of modeling applications available in OpenMx 1.0 and a discussion of directions for future development.

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Figures

Figure 1
Figure 1
An MxModel is a data object that contains metainformation and lists of other Mx objects.
Figure 2
Figure 2
An MxMatrix is a data object that contains metainformation and five R matrices.
Figure 3
Figure 3
MxModels can contain lists of submodels.
Figure 4
Figure 4
Equality constraints can be defined between submodels.
Figure 5
Figure 5
Labels can be used to constrain a matrix element to be equal to a matrix element from an algebraic result.
Figure 6
Figure 6
A simple confirmatory factor analysis model as a RAM–style path diagram.
See this image and copyright information in PMC

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