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strengejacke committed Mar 25, 2024
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Expand Up @@ -84,7 +84,7 @@ For now, we want to focus on the _posterior predictive checks_, _dispersion and
check_model(model1, dot_size = 1.2)
```

Note that unlike `plot()`, which is a base R function to create diagnostic plots, `check_model()` relies on *simulated residuals* for the Q-Q plot, which is more accurate for non-Gaussian models. See [this vignette](https://easystats.github.io/performance/articles/simulate_residuals.html) and the documentation of `simulated_residuals()` for further details.
Note that unlike `plot()`, which is a base R function to create diagnostic plots, `check_model()` relies on *simulated residuals* for the Q-Q plot, which is more accurate for non-Gaussian models. See [this vignette](https://easystats.github.io/performance/articles/simulate_residuals.html) and the documentation of `simulate_residuals()` for further details.

The above plot suggests that we may have issues with overdispersion and/or zero-inflation. We can check for these problems using `check_overdispersion()` and `check_zeroinflation()`, which will perform statistical tests (based on simulated residuals). These tests can additionally be used beyond the visual inspection.

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