Table VI.

Univariate ANOVAs with morphometric variables as dependent and age group and P3a/P3b amplitude/latency groups as between subject factors

Variable	df	F	P
P3a amplitude
Left temporoparietal
Age group	1, 68	6.88	<0.01
P3a amplitude group	1, 68	4.92	<0.05
Age × P3a amplitude	1, 68	1.29	n.s.
Hippocampus
Age group	1, 67	18.76	<0.0001
P3a amplitude group	1, 67	0.10	n.s.
Age × P3a amplitude	1, 67	7.15	<0.01
White matter
Age group	1, 67	9.05	<0.01
P3a amplitude group	1, 67	3.14	n.s.
Age × P3a amplitude	1, 67	3.76	n.s.
P3b latency
Right orbitofrontal
Age group	1, 68	4.84	<0.05
P3b latency group	1, 68	4.22	<0.05
Age × P3b latency	1, 68	2.64	n.s.
Hippocampus
Age group	1, 67	15.67	<0.0001
P3b latency group	1, 67	1.51	n.s.
Age × P3b latency	1, 67	2.84	n.s.
White Matter
Age group	1, 67	7.62	<0.01
P3b latency group	1, 67	0.07	n.s.
Age × P3b latency	1, 67	0.35	n.s.