[R-meta] effect size for proportion with respect to the chance expected
Patrizio Tressoldi
p@trizio@tre@@oldi @ending from unipd@it
Thu Aug 16 10:20:10 CEST 2018
Il 16/08/2018 10:10, Viechtbauer, Wolfgang (SP) ha scritto:
> Dear Patrizio,
>
> What kind of 'effect size' do you want to compute? One could compute the difference between the observed proportion and the expected one (50/100 - .25), or one could compute the (log transformed) ratio (log((50/100) / .25)), or one could compute the (log transformed) odds ratio (log((50/100) / ((100-50)/100) / (.25 / (1 - .25)))), or ... So which one ar you interested in?
>
For the moment I need to compute the difference between the observed and
the expected proportion.
Thanks
Patrizio
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