Correlations.

Columns Var1 and Var2 contain the two variables correlated with each other in the given line. First section: Var1 is Post-error slowing. Second section: Var1 is anterior cingulate grey matter volume. R-values and corresponding p-values are reported for the three genetic groups and for the met-carriers combined. Significant correlations are marked with bold italic typesetting. °:p<0.06, *:p<0.05; **p<0.005.