Table 2.

Barratt Impulsivity Scale (BIS-11) scores

BIS-11 scoring method	Healthy controls	MJ smokers	p (1-tailed)	Effect size (η 2)
Patton
Attention	14.58 ± 4.42	16.83 ± 3.40	0.033	0.080
Motor	19.90 ± 3.99	22.54 ± 4.80	0.032	0.081
Non-planning	21.14 ± 5.72	24.02 ± 4.10	0.031	0.083
Total	55.76 ± 12.34	63.50 ± 9.87	0.014	0.113
Reise
Cognitive	11.22 ± 3.67	12.92 ± 2.71	0.044	0.069
Behavioral	11.99 ± 3.09	14.19 ± 3.65	0.022	0.095
Steinberg
Brief	14.79 ± 4.44	17.01 ± 3.29	0.034	0.079