Table 1.

Descriptive statistics for untransformed variables

Variable	n	M	SD	Skew	Kurtosis
W2 alcohol use Q × F	373	3.49	59.71	19.24	371.05
W3 alcohol use Q × F	367	2.39	17.05	12.08	172.84
W4 alcohol use Q × F	367	4.75	20.73	10.98	156.51
W2 marijuana use frequency	371	0.07	0.69	11.58	147.16
W3 marijuana use frequency	368	0.71	3.55	7.22	61.73
W4 marijuana use frequency	366	2.95	16.80	8.15	74.23
W1 attentional control	387	3.32	0.78	-0.35	-0.22
W2 attentional control	373	3.39	0.76	-0.27	-0.34
W3 attentional control	370	3.42	0.72	-0.31	-0.30
W7 attentional control	352	4.44	1.09	0.11	-0.37
W8 attentional control	349	4.48	1.13	-0.06	-0.23
W9 attentional control	350	4.50	1.17	0.10	-0.34
W1 inhibitory control	387	3.62	0.59	-0.40	0.16
W2 inhibitory control	373	3.68	0.58	-0.46	0.36
W3 inhibitory control	370	3.68	0.58	-0.44	0.00
W7 inhibitory control	352	4.57	0.95	-0.17	-0.37
W8 inhibitory control	349	4.58	0.88	-0.12	-0.22
W9 inhibitory control	350	4.58	0.94	-0.27	-0.03
W1 antisocial problems	387	0.18	0.18	2.36	10.42
W2 antisocial problems	373	0.20	0.20	2.00	8.62
W3 antisocial problems	370	0.22	0.22	1.75	5.08

Notes: W = wave; Q × F = Quantity × Frequency.