Table 1.

Error rates in percent in single-task trials of single-task blocks, single-task trials in mixed blocks (mixed single-task trials), and dual-task trials for the visual task in older and younger adults across Sessions 2–12 (older adults) or Sessions 2–8 (younger adults).

Task	Session	Older adults			Younger adults
		Single-task trials	Mixed single-task trials	Dual-task trials	Single-task trials	Mixed single-task trials	Dual-task trials
Visual task	2	1.8	0.4	2.3	2.3	0.4	3.9
	3	1.4	1.0	3.1	3.0	1.0	2.2
	4	1.6	0.7	2.7	3.9	1.5	2.1
	5	1.8	0.5	2.2	4.0	1.3	1.9
	6	2.0	1.5	2.6	4.7	1.3	1.8
	7	2.0	1.0	1.5	5.7	2.3	2.5
	8	2.4	0.8	1.3	4.9	1.9	2.6
	9	2.1	1.3	1.4
	10	3.1	1.2	0.8
	11	3.2	1.3	0.8
	12	3.3	1.5	0.6
	13	3.7	1.8	0.8
	14	3.2	2.3	1.2
	15	3.8	1.6	1.2
	16	3.6	2.9	1.3
	17	1.9	2.4	2.9
	18	3.6	3.9	0.5
	19	0.8	0.5	1.4
	20	1.1	1.4	1.2
	21	1.9	0.4	1.1

Session 2–12: Strobach et al. (2012b), Session 13–16: Experiment 1, Session 17–21.