TABLE 1.

Participant characteristics and task performance at each assessment wave

Age	N	Age		Correct		Reaction time		P3 amplitude		P3 latency
		Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
11	1456	11.8	0.4	76.2	4.9	1189	221	35.9	10.4	567	91
14	1187	14.8	0.5	77.9	2.8	943	166	31.4	9.1	492	75
17	963	18.0	0.6	78.9	1.6	853	144	24.7	8.6	434	54
20	1083	21.4	0.8	78.9	1.6	832	152	22.9	8.2	417	53
24	1032	25.1	0.6	79.2	1.5	795	140	21.6	7.8	408	48

Note: N gives the number of participants with usable data at each wave. The column labeled Correct gives the mean number of correct responses to target stimuli (out of 80). Mean and SD are the mean and standard deviation of each measure. Reaction time and P3 latency are measured in ms, P3 amplitude in microvolts.