Table 1.

Group median ± bootstrapped standard error of the median PPC values between IPS and AC. In each subject, the PPC values pooled across 50–650 ms after attended non-target sound onsets. The a priori comparisons reflect Wilcoxon signed rank test between the intra- vs. cross-hemispheric PPC (*p<0.05, **p<0.01). The intra-hemispheric PPC was significantly larger than cross-hemispheric PPC in the right HG, PT, and pSTG, with the differences at 10 Hz being most wide spread. In contrast, in certain the left PT and pSTG, the cross-hemispheric PPC was larger than intra-hemispheric PPC, consistent with the idea that the right IPS dominates auditory spatial attention.

		Attend Left		Attend Right
AC region	f [Hz]	Right AC × Right IPS	Right AC × Left IPS	Left AC × Left IPS	Left AC × Right IPS
Heschl's gyrus	4	0.031 ± 0.015	0.021 ± 0.015**	0.037 ± 0.019	0.033 ± 0.011
	7	0.033 ± 0.012	0.017 ± 0.010**	0.019 ± 0.008	0.019 ± 0.006
	10	0.027 ± 0.018	0.024 ± 0.008**	0.049 ± 0.012	0.039 ± 0.013
	13	0.022 ± 0.016	0.022 ± 0.008	0.028 ± 0.008	0.028 ± 0.010
	16	0.017 ± 0.014	0.011 ± 0.006	0.016 ± 0.007	0.007 ± 0.009
	19	0.018 ± 0.014	0.005 ± 0.005**	0.007 ± 0.005	0.005 ± 0.004
Planum temporale	4	0.006 ± 0.006	0.004 ± 0.006*	0.008 ± 0.004	0.001 ± 0.003
	7	0.010 ± 0.005	0.006 ± 0.004	0.010 ± 0.005	0.015 ± 0.006*
	10	0.018 ± 0.009	0.007 ± 0.004*	0.023 ± 0.008	0.016 ± 0.008
	13	0.017 ± 0.006	0.013 ± 0.005	0.024 ± 0.008	0.013 ± 0.008
	16	0.005 ± 0.005	0.004 ± 0.004	0.011 ± 0.008	0.007 ± 0.007
	19	0.006 ± 0.003	0.005 ± 0.002	0.005 ± 0.003	0.006 ± 0.003
Posterior STG	4	0.011 ± 0.009	0.010 ± 0.007	0.011 ± 0.006	0.005 ± 0.003
	7	0.013 ± 0.007	0.012 ± 0.006	0.011 ± 0.004	0.016 ± 0.005*
	10	0.024 ± 0.010	0.008 ± 0.009*	0.037 ± 0.009	0.022 ± 0.009
	13	0.018 ± 0.007	0.014 ± 0.005	0.032 ± 0.011	0.011 ± 0.011
	16	0.008 ± 0.008	0.003 ± 0.004	0.017 ± 0.007	0.008 ± 0.008
	19	0.010 ± 0.006	0.007 ± 0.004*	0.005 ± 0.005	0.004 ± 0.005
Anterior STG	4	0.008 ± 0.004	0.009 ± 0.005	0.006 ± 0.006	0.008 ± 0.005
	7	0.013 ± 0.006	0.007 ± 0.009	0.020 ± 0.008	0.014 ± 0.005
	10	0.023 ± 0.009	0.025 ± 0.007	0.036 ± 0.020	0.027 ± 0.013
	13	0.010 ± 0.006	0.017 ± 0.009	0.018 ± 0.018	0.017 ± 0.012
	16	0.006 ± 0.005	0.007 ± 0.005	0.012 ± 0.008	0.011 ± 0.006
	19	0.006 ± 0.005	0.005 ± 0.004	0.009 ± 0.004	0.009 ± 0.004