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Published byDonna Pearson Modified over 9 years ago
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Kayla Jordan D. Wayne Mitchell RStats Institute Missouri State University
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What is SEM? Statistical technique useful for testing theoretical models Theory-driven Confirmatory
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Types of Variables Latent Variable Exogenous Variable Manifest or Observed Variable Error Residual Endogenous
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Types of Models Measurement Model Structural Model
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Degrees of Freedom Knowns: n(n+1)/2 -> 8(9)/2 -> 36 Unknowns: 5 factor loadings, 2 path coefficients, 8 error variances, 2 residuals -> 17 total unknowns Degrees of Freedom: Knowns – Unknowns -> 19
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Estimates
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Factor Loadings Indicates all observed variables are measuring the latent variable. Values closer to one indicate that the observed variable is measuring latent better (e.g., H3 is a better item than H6)
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Confirmatory Factor Analysis
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Path Analysis
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Full Structural Model
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Multi-Trait, Multi-Method
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Fit Indices
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Model Comparisons Need for Multiple Models Chi-Square Difference CFI Difference
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Assumptions Sample Size Normality Outliers Multicollinearity
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Programs
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Questions? Contact: kaylajordan91@gmail.com
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