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structural equation modeling (sem)
How Does SEM Work?
SEM uses a combination of
path diagrams
and
statistical equations
to represent and test relationships. The process generally includes:
1.
Model Specification:
Defining the hypothesized relationships among variables using path diagrams and equations.
2.
Model Identification:
Ensuring that the model is statistically identifiable, meaning there are enough data points to estimate the parameters.
3.
Model Estimation:
Using statistical software to estimate the parameters (e.g., regression coefficients, variances) of the model.
4.
Model Evaluation:
Assessing the fit of the model using various fit indices like the
Chi-square test
,
CFI
,
TLI
, and
RMSEA
.
5.
Model Modification:
Refining the model based on the evaluation results and theoretical considerations.
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