Table 1.

Demographic details of participants

	FB group (n = 7)	PA group (n = 8)	P
Age (years)	56.86 ± 8.7	55.38 ± 8.9	0.75
Years of education	12.00 ± 2.0	14.25 ± 4.3	0.29
Mini‐mental state examination (0–30)	29.69 ± 0.5	29.00 ± 1.7	0.37
Premorid IQ estimate from NART	112.17 ± 7.8	114.67 ± 11.8	0.67
Beck Depression Inventory (0–63)	1.50 ± 1.9	3.00 ± 4.3	0.45
Amount of 11C‐raclopride injected (MBq)	291.48 ± 25.2	297.06 ± 27.7	0.72

FB = feedback, PA = paired associate, WPT = weather prediction task, NART = National Adult Reading Test.

Numbers shown are mean ± standard deviation.