Table 1. Summary Demographics of All Participants Binned Into Four Equal-Sized Groups According to Age.

Age group		1	2	3	4
Note. M = male; F = female; MMSE = Mini Mental Status Examination.
N		34	35	35	35
Age	Mean (SD)	25.2 (4.0)	35.2 (2.6)	49.2 (5.9)	67.5 (5.4)
	Range	19–31	31–40	40–60	60–83
Sex	M/F	18/16	18/17	13/22	13/22
Education (years)	Mean (SD)	15.6 (3.2)	16.9 (2.5)	15.0 (2.9)	15.3 (3.8)
MMSE	Mean (SD)	29.6 (0.5)	29.4 (1.0)	29.7 (0.6)	29.5 (0.8)
Digit span	Forwards	9.6	9.7	9.6	10.5
	Backwards	7.5	7.9	7.6	7.0