Table 1.

Demographic characteristics of study sample

	Experiment 1				Experiment 2
	A/Not-A		A/B (Feedback)		A/B (Observational)
	AD	EC	AD	EC	AD	EC
N	14	14	15	15	15	15
Age (years)	72.9 (5.4)	70.9 (6.4)	75.5 (8.5)	72.2 (7.0)	74.8 (6.1)	72.5 (6.8)
Gender (male/female)	8/6	5/9	5/10	5/10	8/7	4/11
Education (years)	15.1 (2.7)	17.0 (2.3)	15.0 (2.6)	16.5 (3.6)	13.7 (2.9)	16.1 (2.5)
MMSE	23.8 (2.8)	28.7 (1.3)	25.4 (2.4)	28.7 (1.0)	23.8 (3.1)	29.2 (0.8)

Values are Mean (SD); MMSE = Mini-Mental State Examination.