Table 1.

Effects for 3 contrasts

fROI	HardArtic > Fix	EasyArtic > Fix	Hard > EasyArtic
SPGI	t = 1.77; P < 0.05	t = 1.89; P < 0.05	t < 1; n.s.
SPGIsph	t = 3.75; P < 0.001	t = 3.68; P < 0.001	t = 1.33; n.s.
SPGI subj-spec anat	t < 1; n.s.	t < 1; n.s.	t < 1; n.s.
LIFGop	t = 8.00; P < 0.0001	t = 7.25; P < 0.0001	t = 3.78; P < 0.001

Effect for 3 contrasts (hard articulation > fixation, easy articulation > fixation, and hard > easy articulation) estimated in data not used for defining the functional regions of interest (ROIs) using across-runs cross-validation and using one-tailed paired-samples t-tests. Degrees of freedom = 19. SPGI, superior precentral gyrus of the insula; sph, spherical; subj-spec anat, subject-specific anatomical; LIFGop, left inferior frontal gyrus region.