Fisher’s transformation

PerPalmgren

Can somebody help me how to in JASP convert two correlation coefficients to z-scores using Fisher’s transformation?

andersony3k

Fisher's z = .5 ( NaturalLog[1 + r] - NaturalLog[1 - r] ).

So you need to do the Fisher's z transformations after you've used JASP to compute the correlations.

vandenman

Hi PerPalmgren,

If you have a column with the correlations you can create a new column that computes the z-scores from the correlations like so:

or with R code like so

Behind the scenes, that computes

z = .5 ( NaturalLog[1 + r] - NaturalLog[1 - r] ) = atanh(r).

like andersony3k pointed out.

I hope that helps!

Cheers,

Don