Description Usage Arguments Value Author(s) Examples
Convert a correlation to a z or t, or d, or chi score or z to r using the Fisher transformation or find the confidence intervals for a specified correlation. r2d converts a correlation to an effect size (Cohen's d) and d2r converts a d into an r. g2r converts Hedge's g to a correlation. t2r converts a t test to r, r2t converts a correlation to a t-test value. chi2r converts a chi square to r, r2chi converts it back.
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rho |
a Pearson r |
z |
A Fisher z |
n |
Sample size for confidence intervals |
df |
degrees of freedom for t, or g |
p |
Confidence interval |
twotailed |
Treat p as twotailed p |
d |
an effect size (Cohen's d) |
g |
An effect size (Hedge's g) |
t |
A student's t value |
chi |
A chi square |
z value corresponding to r (fisherz) \ r corresponding to z (fisherz2r) \ lower and upper p confidence intervals (r.con) \ t with n-2 df (r2t) r corresponding to effect size d or d corresponding to r.
Maintainer: William Revelle revelle@northwestern.edu
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