de>: inverse of the former.</p></li>
<li><p><code>transf.r2toz</code>: variance stabilizing transformation for the coefficient of determination, given by <em></em>\(z_i = \frac{1}{2} \log\mathopen{}\left(\frac{1+\sqrt{R_i^2}}{1-\sqrt{R_i^2}}\right)\mathclose{}\) (see Olkin &amp; Finn, 1995, but with the additional <em></em>\(\frac{1}{2}\) factor for consistency with the usual r-to-z transformation).</p></li>
<li><p><code>transf.ztor2</code>: inverse of the former.</p></li>
<li><p><code>transf.ztor.int</code