Table 2.

Cluster Peaks for whole sample effect of difficulty (Hard vs. Easy)

A. Positive Modulation to Difficulty Effect [Hard > Easy]
Cluster Label	BA	k	X	Y	Z	t-value	p FWE
L/R anterior cingulate & R insula / inferior frontal	8	3050	6	24	45	10.30	<.001
	13		30	24	−3	10.06
	46		45	36	18	9.94
R posterior/inferior parietal & middle occipital	7	2809	30	−57	54	9.81	<.001
	18		27	−87	18	9.67
	40		48	−39	48	9.65
L Cerebellar Crus I & II		483	−33	−69	−45	8.49	<.001
			−30	−66	−33	8.43
			−9	−78	−30	7.94
L insula	13	153	−30	21	0	8.18	<.001
L precentral & inferior frontal	44	119	−45	3	27	6.02	.001
	44		−57	18	33	4.58
L inferior orbital frontal	47	64	−45	45	−6	5.61	.009
B. Negative Modulation to Difficulty Effect [Hard < Easy]
Cluster Label	BA	k	X	Y	Z	t-value	pFWE
L/R Precuneus	31	13885	0	−63	24	11.90	<.001
	31		9	−54	33	11.51
	23		−6	−54	27	11.42
R inferior occipital	18	163	27	−96	−3	10.70	<.001
L inferior occipital	18	115	−24	−96	−9	8.42	.001
R cerebellum		49	9	−54	−45	6.98	.017
R cerebellar crus II		206	24	−84	−36	6.67	.005
			45	−75	−39	5.36
L middle orbital frontal	47	79	−27	36	−15	6.64	<.001
R middle frontal	8	40	24	33	39	5.30	.032

Note. p < .0001 uncorrected; Abbreviations: BA – Brodmann Area; L – left; R – Right