Checks a simple, multiple, or mixed-effects linear regression model for normality. The function outputs an orientation plot
and computes a relevant statistical test: Shapiro-Wilk test on model residuals.

## Arguments

- mdl
A simple, multiple, or mixed-effects linear regression model.

## Value

A plot and a test results in the console.

## Author

D. Schmitz & J. Esser

## Examples

```
data("data_s")
model <- lm(sDur ~ typeOfS + pauseDur, data_s)
normality_check(model)
#> Error in ggplot(): could not find function "ggplot"
```