I’m a bit new to brms and bayesian modeling in general so this might be an obvious one. I am trying to calculate heritability (h2) of a single trait using a pedigree. In a simplified framework, I’m interested in what proportion of the variance of the trait of interest (phenotypic variance, VP) is c…

The phi in the output is the actual phi as you don’t predict it (but assume it to be constant across observations) and hence brms uses no link function (i.e., an identity link).

Both that discussion and this one are related to my questions. Phylogenetic models are analogous to pedigree modes, and upon further reading I think the best way to address my second question will be to use the hypothesis framework from the phylogenetic model vignette . I am still trying to figure …

So from my betabinomial models I should be able to calculate residual variance directly as 𝛟𝛑2/3?

If that is the right variance formula then yes, but i haven’t checked its correctness.

Heritability from betabinomial GLMM variance estimates using pedigree data

Interfaces brms

maxbiostat July 22, 2020, 5:20pm 2

See if the discussion here helps you.

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Heritability from betabinomial GLMM variance estimates using pedigree data

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