Table 3. Main effects of synaesthesia in the synaesthetic priming experiment.

Contrast	Brain region	k	p	MNI (x,y,z)	T-value
Interaction Synaesthetes>Controls for Synaesthetic (CC & IC)>Colour (CC & IC)	L Superior parietal lobule/Prec (BA 7)	252	0.077	−26, −60, 38	4.16
	L Superior parietal lobule (BA 7)			−30, −54, 56	3.47
SVC: 15 mm sphere at SPL (−24, −58, 46)	L Superior parietal lobule/Prec (BA 7)	238	0.002	−26, 60, 38	4.16
	L Superior parietal lobule (BA 7)			−26, −60, 44	3.95
	L Superior parietal lobule (BA 7)			−30, −54, 56	3.47

fMRI results for the interaction of synaesthetes compared to controls, for the synaesthetic CC and IC conditions compared to the real colour CC and IC conditions (N = 19 synaesthetes, N = 19 controls) of Experiment 2. Random effects analyses, extent threshold ≥50 voxels, whole brain threshold P<.001_uncorrected. Listed are cluster size (k), corrected P-values at cluster-level (p), MNI coordinates of local maxima and T-values. Brodmann areas (BA) are in parentheses. R = right, L = left, CC = congruent (synaesthetic) colour condition, IC = incongruent (synaesthetic) colour condition, SVC = Small Volume Correction, Prec = Precuneus.