Two independent group correlations may be compared using [[attachment:Fisher.xls|this spreadsheet]]. Alternatively copy and paste the syntax '''in the box below''' into a SPSS syntax window, select all and click the run arrow key. Amend the SPSS input data as required. {{{ set format f10.5. DATA LIST free /r1 r2 n1 n2. BEGIN DATA. .50 .32 10 13 .59 .31 15 23 .80 .72 20 26 END DATA. ================================. * /* Fisher's test for two independent * correlations (r1=r2) having * n1 and n2 observations * * input columns: r1 r2 n1 n2 * * outputted p-values are one-tailed - * just double to obtain two-tailed */. * *=================================. set mexpand off. set format f10.5. define !indep ( !pos !tokens(1) / !pos !tokens(1) / !pos !tokens(1) / !pos !tokens(1)). compute #lct1=0.5*ln((1+!1)/(1-!1)). compute #lct2=0.5*ln((1+!2)/(1-!2)). compute z=0.0. compute z=(#lct1-#lct2)/sqrt((1/(!3-3))+(1/(!4-3))). if (z le 0) prob_z=cdfnorm(z). if (z gt 0) prob_z=1-cdfnorm(z). list variables=!1 !2 z prob_z. !enddefine. set mexpand on. !indep r1 r2 n1 n2. set mprint off. }}} * Multiple invocations of the macro in the same interactive session will produce the following note: >The macro name specified on the DEFINE command duplicates the name of a previously defined macro. This instance will take precedence. This warning does not indicate a problem and may be ignored. * [[FAQ/OMScorrs| Comparing correlations between two matrices in SPSS]].