Utility functions to transform various effect size measures into each other.
r2z(r)
r2d(r)
z2r(z)
z2d(z)
A correlation coefficient.
A z-value, ie a normalized effect size.
Return values are z, d or r values.
Transform effect sizes into correlations, (Cohen's) d effect sizes, or z-distributed for performing meta regression.
Tba
# NOT RUN {
## The function r2z is currently defined as
function(r) {
return(0.5*(log(1+r)-log(1-r)))
}
# }
Run the code above in your browser using DataLab