Table 1. Age distribution, and psychometric measures predictive of behaviour, for the discovery and confirmation samples.

	Discovery: Males	Discovery: Females	Confirmation: Males	Confirmation: Females
14-15	47	54	24	27
16-17	48	51	21	27
18-19	47	50	19	27
20-21	48	49	28	33
22-24	47	51	28	32
	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD
IQ (WASI)	111.95 ± 11.41	109.45 ± 11.18	111.89 ± 11.6	109.99 ± 11.05
CADS daringness	2.67 ± 0.55	2.24 ± 0.61	2.61 ± 0.59	2.28 ± 0.61
BIS cogn. compl.	2.18 ± 0.47	2.32 ± 0.45	2.22 ± 0.49	2.27 ± 0.48

See Supplementary Results 4 for performance (tokens retained) of the different age groups.