Table 1.

Overview of the subjects, procedures, and results

	Group 1	Group 2	Group 3	Group 4	Group 5
No. of subjects	24	25	24	24	19
Male/female subjects (No.)	12/12	10/15	12/12	12/12	11/8
Age (years; mean ± SD)	24.1 ± 1.2	22.4 ± 2.6	24.3 ± 3.9	22.4 ± 3.2	23.9 ± 4.0
No. of object pairs	60	60	60	120	120
MDE (Z-score ± SEM)	0.13 ± 0.07	0.13 ± 0.03	0.12 ± 0.06	0.14 ± 0.05	0.18 ± 0.04
t value	t(23) = 1.88	t(24) = 3.82	t(23) = 1.97	t(23) = 2.67	t(18) = 4.28
p value	<0.05	<0.001	<0.05	<0.01	<0.001
Recognition task	No	No	No	Yes	Yes
fMRI	No	No	No	No	Yes