Interpreting Rao's Q for individual binary trait

[michael...@augustana.edu]

I would greatly appreciate a short explanation of how to interpret high versus low Rao's Q indices for a binary trait (for example winged versus not-winged).  I understand it's interpretation for quantitative and categorical traits.  

Many thanks

[Bruce McCune]

I would be curious to hear ideas on this too. I believe it is analogous to applying Simpson's diversity index to presence data, which rather defeats the purpose of a measure that is strongly controlled by relative abundance.

Bruce McCune

On Fri, Jun 6, 2025 at 1:22 PM michael...@augustana.edu <michael...@augustana.edu> wrote:

I would greatly appreciate a short explanation of how to interpret high versus low Rao's Q indices for a binary trait (for example winged versus not-winged).  I understand it's interpretation for quantitative and categorical traits.  

Many thanks

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