Hi!

I am currently using Jamovi for analysing some data and I have a doubt.

I need to interpret the Mann-Whitney U output, especially the effect size available in the software (rank biserial correlation).

I have read the paper by Kerby but I haven't been able to understand which formula, whithin the ones proposed by the author, has been used to perform the effect size.

Could you give me some clarification about that and about the interpretation of the rbc value?

Thanks in advance,

Lydia