Table 2. Performance of Younger and Older adults.

	Younger	Older	Older Low	Older High
N	31	27	13	14
WML 2	0.96 (0.03)	0.95 (0.04)	0.93 (0.04)	0.96 (0.03)
WML 4	0.82 (0.08)	0.76 (0.08)	0.71 (0.06)	0.80 (0.08)
WML 6	0.71 (0.08)	0.66 (0.07)	0.63 (0.05)	0.70 (0.07)
WML 8	0.63 (0.07)	0.63 (0.07)	0.57 (0.05)	0.67 (0.05)
mean K	2.40 (0.71)	2.01 (0.67)	1.45 (0.32)	2.52 (0.46)
range K	1.31 - 3.60	0.91 - 3.41	0.91 - 1.97	2.00 - 3.41
No F	0.77 (0.01)	0.72 (0.01)	0.72 (0.09)	0.73 (0.10)
Rel F 50	0.60 (0.15)	0.59 (0.13)	0.59 (0.12)	0.59 (0.14)
Rel F 150	0.66 (0.11)	0.56 (0.12)	0.53 (0.10)	0.59 (0.13)
Rel F 250	0.71 (0.12)	0.58 (0.14)	0.55 (0.13)	0.60 (0.14)
Rel F 350	0.70 (0.13)	0.60 (0.13)	0.55 (0.14)	0.65 (0.10)
Irrel F 50	0.74 (0.11)	0.68 (0.11)	0.66 (0.09)	0.70 (0.13)
Irrel F 150	0.74 (0.14)	0.69 (0.13)	0.70 (0.12)	0.68 (0.15)
Irrel F 250	0.77 (0.09)	0.69 (0.13)	0.71 (0.11)	0.66 (0.15)
Irrel F 350	0.78 (0.10)	0.68 (0.11)	0.68 (0.12)	0.69 (0.10)
Rel CC 50	0.17 (0.12)	0.13 (0.09)	0.13 (0.08)	0.13 (0.10)
Rel CC 150	0.12 (0.07)	0.16 (0.10)	0.19 (0.08)	0.13 (0.12)
Rel CC 250	0.06 (0.08)	0.15 (0.08)	0.16 (0.08)	0.13 (0.08)
Rel CC 350	0.07 (0.08)	0.12 (0.08)	0.16 (0.08)	0.07 (0.06)
Irrel CC 50	0.03 (0.07)	0.03 (0.06)	0.05 (0.04)	0.02 (0.06)
Irrel CC 150	0.02 (0.11)	0.04 (0.10)	0.03 (0.08)	0.05 (0.10)
Irrel CC 250	0.01 (0.06)	0.03 (0.09)	0.00 (0.06)	0.06 (0.10)
Irrel CC 350	0.00 (0.06)	0.03 (0.08)	0.03 (0.09)	0.03 (0.08)

Mean performance of Younger and Older adults (visual WMC subgroups Older-low and Older-high). Visual working memory load (WML) and K estimates were derived from the change detection task (Cowan, 2001). Capture task accuracy for the no flanker condition (No F), relevant flanker condition (Rel F), irrelevant flanker condition (Irrel F) with corresponding SOAs (50-350ms). Capture costs scores are calculated by subtracting the no flanker from the relevant flanker accuracy (Rel CC) or the irrelevant flanker accuracy (Irrel CC). Standard deviations are in parentheses.