Table 4.

Breakdown of Age x Demand interaction: Age group contrasts for Hard vs. Easy

Cluster	k	x y z peak (mm)	t
Young modulation > middle-aged
None
Middle-aged modulation > young
L/R/midline superior frontal	36	0 72 27	4.57
Middle-aged modulation > older
L/R/ medial superior frontal/anterior cingulate	727	−15 24 60	5.55
R middle frontal/inferior frontal	158	45 6 39	4.43
L inferior frontal	108	−42 24 30	4.17
R orbital frontal/inferior	49	51 36 −18	3.98
R middle/inferior temporal	37	63 −39 0	3.63
L caudate	41	−12 15 9	4.76
R putamen/insula	30	33 9 −6	3.87
Older modulation > middle-aged
L cuneus/calcarine	47	0 −93 24	4.09
Older modulation > very old
L orbital frontal/middle/inferior	124	−36 51 −3	4.75
L orbital frontal/inferior	43	−36 30 −6	3.79
L supplemental motor	32	0 15 54	3.66
L precentral	32	−42 6 45	3.55
L postcentral	45	−48 −24 51	3.74
R caudate	30	21 27 3	3.94
L thalamus/putamen	63	−18 −18 9	3.73
L midbrain/cerebellum	75	−6 −39 −21	4.11
Very old modulate > older
None

Note. p < .001, minimum k threshold for cluster voxels = 30; L = left; R = right; young = 20–39 years old; middle-aged = 40–59 years old; older = 60–79 years old; very old = 80–89 years old