Fig. 5.

Mean number of activated voxels (NOV) obtained in bilateral (a) superior temporal gyrus, (b) Heschl's gyrus, (c) superior frontal gyrus, (d) middle frontal gyrus, (e) inferior frontal gyrus, and (f) anterior cingulate cortex is plotted as a function of signal-to-noise ratio (SNR). The dotted interpolation lines indicate the 95% confidence interval of the quadratic polynomial fit through the data points of all conditions. The asterisk mark indicates a significant F-ratio (p < .05) for the quadratic trend. The error bars indicate the group ±1 standard deviation around the mean.