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