R Graphical Manual

Last data update: 2014.03.03

R: Transform effect sizes.

transformations

R Documentation

Transform effect sizes.

Utility functions to transform various effect size measures into each other.

r2z(r)
r2d(r)
z2r(z)
z2d(z)

`r`	A correlation coefficient.
`z`	A z-value, ie a normalized effect size.

Transform effect sizes into correlations, (Cohen's) d effect sizes, or z-distributed for performing meta regression.

Return values are z, d or r values.

Ingmar Visser.

Tba


## The function r2z is currently defined as
function(r) {
	return(0.5*(log(1+r)-log(1-r)))
  }