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Kayla Jordan D. Wayne Mitchell RStats Institute Missouri State University.

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Presentation on theme: "Kayla Jordan D. Wayne Mitchell RStats Institute Missouri State University."— Presentation transcript:

1 Kayla Jordan D. Wayne Mitchell RStats Institute Missouri State University

2 What is SEM?  Statistical technique useful for testing theoretical models  Theory-driven  Confirmatory

3 Types of Variables Latent Variable Exogenous Variable Manifest or Observed Variable Error Residual Endogenous

4 Types of Models Measurement Model Structural Model

5 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

6 Estimates

7 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)

8 Confirmatory Factor Analysis

9 Path Analysis

10 Full Structural Model

11 Multi-Trait, Multi-Method

12 Fit Indices

13 Model Comparisons  Need for Multiple Models  Chi-Square Difference  CFI Difference

14 Assumptions  Sample Size  Normality  Outliers  Multicollinearity

15 Programs

16 Questions? Contact: kaylajordan91@gmail.com


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