This function transforms a correlation (r) to a z variate using the formula
provided on page 53 of Cohen & Cohen (1983). The formula is z=.5*((log(1+r))-(log(1-r)))
where r is the correlation.
Usage
rtoz(rvalue)
Arguments
rvalue
The correlation for which one wants the z transformation.
Value
Produces a single value, the z transformation.
References
Cohen, J. & Cohen, P. (1983). Applied multiple regression/correlation analysis
for the behavioral sciences (2nd Ed.). Hillsdale, NJ: Lawrence Erlbaum Associates.