ISC for the A versus V condition was compared between TD and SD participants within the six brain regions obtained from the conjunction analysis (Wilcoxon rank sum test, two-tailed, P < 0.05 Bonferroni corrected for the number of regions). All regions except the bilateral posterior parietal cortex retained a significantly greater ISC in TD than SD individuals (left temporo-parietal: W = 11,926, P Bonf < 0.001, N TD = 100, N SD = 81, r TD-SD = 0.029, standard error (SE) 0.003; bilateral posterior parietal: W = 9,961, P Bonf = 0.085, N TD = 100, N SD = 81, r TD-SD = 0.007, SE 0.003; right temporo-parietal: W = 11,077, P Bonf < 0.001, N TD = 100, N SD = 81, r TD-SD = 0.015, SE 0.002; right dorso-lateral prefrontal: W = 10,452, P Bonf < 0.001, N TD = 100, N SD = 81, r TD-SD = 0.010, SE 0.002; bilateral medial prefrontal: W = 11015, P Bonf < 0.001, N TD = 100, N SD = 81, r TD-SD = 0.015, SE 0.002; left inferior frontal: W = 11,913, P Bonf < 0.001, N TD = 100, N SD = 81, r TD-SD = 0.028, SE 0.003). Average ISC (with SE) in the AV condition is shown, by a shaded area in rose, as a ceiling effect due to multisensory integration. Transparency is applied to indicate that the group ISC was not significant (NS, P > 0.05) compared with a null distribution. In each box, the dark line represents the sample mean and the dark-grey shaded box the 95% confidence interval of the SE of the mean, while the light-grey shaded box indicates the standard deviation.
