Table 2.

Cluster peaks for the whole sample effect of increasing difficulty from Easy to Medium.

A. Increased activation from easy to medium cluster-level
	Cluster Label	BA	k	X	Y	Z	t-value	pfwe
L superior and middle		18	344	−9	−102	9	9.58	<.001
	occipital gyrus	18		−24	−93	15	7.68
		18		−36	−78	3	4.66
R cuneus and middle occipital		18	536	12	−96	15	9.51	<.001
	gyrus	18		27	−87	18	8.18
		18		3	−81	−3	6.21
L/R anterior cingulate gyrus		8	71	6	21	42	5.48	0.008
		32		−6	21	39	4.26
B. Deceased activation from easy to medium cluster-level
	Cluster Label	BA	k	X	Y	Z	t-value	pfwe
R inferior occipital gyrus		18	200	24	−93	−3	9.99	<.001
L inferior occipital gyrus and		18	379	−18	−93	−9	8.68	<.001
	cerebellum crus 1 & 2			−21	−78	−39	6.22
				−33	−84	−30	6.15
R middle temporal and gyrus		39	747	54	−60	21	7.63	<.001
	angular gyrus	37		66	−48	−3	5.59
		39		48	−66	39	4.93
L/R posterior cingulate gyrus		23	814	6	−45	30	6.32	<.001
	and precuneus	7		0	−57	45	6.31
		7		−6	−57	66	6.25
L middle and superior		8	215	−30	27	48	6.12	<.001
	frontal gyrus	8		−15	39	45	4.49
		9		−36	36	36	4.11
R cerebellum crus 1			358	54	−66	−33	6.02	<.001
				45	−72	−33	5.14
				27	−81	−30	5.08
L posterior parietal and		39	573	−39	−72	42	5.82	<.001
	middle temporal gyrus	39		−54	−45	30	5.57
		39		−51	−63	18	5.13
R middle frontal gyrus		8	74	27	30	45	5.35	0.007
R middle temporal gyrus		21	94	60	−9	−18	5.33	0.003
L inferior temporal gyrus		37	99	−57	−51	−6	5.2	0.003
L/R superior medial frontal		10	37	12	63	15	4.99	0.039

Note. p<.0001 uncorrected, cluster-level FWE p<.05. BA=Brodmann׳s area.