Information Criteria

Figure 1. Information criteria for unstructured covariance model
Information criteria for unstructured covariance model
Figure 2. Information criteria for autoregressive covariance model
Information criteria for autoregressive covariance model

The information criteria are smaller for the model with the unstructured covariance matrix for repeated effects, suggesting that it provides a better fit to the data. Now look for changes in the fixed effects and covariance parameter estimates to determine the practical significance of changing the covariance structure.

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