Table 1.

Descriptive statistics for behavioral variables.

	n	mean	sd	min	max	skew	kurtosis	Reliability	6-year stability^†
Antisaccade (234 ms cue)	276	44.42	21.03	6.67	96.67	0.35	−0.70	0.94^*	0.68^°
Antisaccade (284 ms cue)	289	58.95	21.25	8.33	96.67	−0.36	−0.77	0.93^*	0.68^°
Stroop	580	145.93	75.09	−163.32	373.03	0.55	0.84	0.96^*	0.48
Keep track	579	0.77	0.13	0.36	1.00	−0.69	0.14	0.74^{^}	0.51
Letter memory	585	73.28	13.97	35.61	100.00	−0.05	−0.97	0.93^{^}	0.84
Number-letter	568	182.22	120.73	−60.54	565.48	0.93	0.94	0.93^*	0.55
Category switch	583	180.32	149.90	−103.05	664.08	1.22	1.55	0.93^*	0.66
Common EF	587	0.00	0.81	−2.42	2.02	−0.13	−0.45		0.80
Shifting-specific EF	586	0.00	0.65	−2.11	1.70	−0.32	−0.26		0.62
Updating-specific EF	584	0.00	0.73	−2.52	1.73	−0.81	0.65		0.68

EF = Executive Functioning.

Split-half reliability (odd/even for Stroop task and category-switch task or run1/run2 for antisaccade task and number–letter task), adjusted with the Spearman-Brown prophecy formula.

^{^}

Cronbach’s alpha across 3 runs for keep-track and 4 sets of trials for letter memory.

^†

Pearson’s r between behavioral performance at current time and prior wave of data collection.

^°

6-year stability for antisaccade task calculated across 234 and 284 ms cue versions.