Table 2.

Multivariate tests discriminant effects^a.

Effect	Pillai's Trace	F	df	Error df	p-Value	Partial η2
Intercept	0.04	5.253	6	765	<0.001	0.04
Country	0.321	8.8	30	3845	<0.001	0.064
Gender	0.019	2.49	6	765	0.022	0.019
Ethnicity	0.029	1.872	12	1532	0.034	0.014
Age	0.051	6.912	6	765	<0.001	0.051
PSF	0.032	4.266	6	765	<0.001	0.032
PAF	0.007	0.937	6	765	0.468	0.007
IQ	0.019	2.527	6	765	0.02	0.019
Frequency of cannabis use	0.027	1.763	12	1532	0.049	0.014

^aDesign: Intercept + country + gender + ethnicity + age + PSF + PAF + IQ + frequency of cannabis use.