Hello @paul.buerkner, I encounter this prior problem and here are my questions:

- How is \sigma scale calculated in t-distribution in
`brms`

? In the paper, you said the degrees of freedom \nu is 3 by default, and the second argument, presumably, is the median of the data. But I didn’t find an explanation on how the \sigma is calculated. - What default priors do population-level effects b use in
`brms`

? If I use`get_prior`

, the prior of b is empty, and I didn’t find the prior information by using`make_stancode`

either.

Thank you in advance for your time and help.