Table 2.

Demographics and behavior performance

	Sample
	Development	Aging	Total
N (female/male)	105 (61/44)	165 (106/59)	270 (167/103)
Mean age (range)	19.4 (6.8–30.4)	55.8 (30.8–80.8)	41.66 (6.8–80.8)
Source memory	53.2% (16.4)	49.7% (13.8)	51.1% (14.9)
Recognition	75.7% (11.1)	74.1% (10.6)	74.7% (10.8)
Misses	21.3% (10.7)	22.4% (10.2)	21.7% (10.4)
False alarms	4.5% (5.8)	6.4% (4.5)	5.7% (5.1)
d′	2.58 (0.61)	2.27 (0.52)	2.39 (0.57)

Demographics and memory performance scores for the development sample (left), the aging sample (middle), and the total sample (right) are shown. Range is shown for age; SD is shown in the parentheses for the memory performance measures. The d′ measure was derived from recognition and false alarms.