Table 2

Zero-order correlation matrix between cannabis involvement variables and neuropsychological task performance

Variable	1	2	3	4	5	6	7	8	9	10	11	12	13
1. THC+ urine drug screen	—
2. CUD+	0.271^**	—
3. Cannabis age of first use	0.329^**	0.409^**	—
4. Lifetime cannabis use	0.502^**	0.556^**	0.800^**	—
5. Penn Word Memory Test	0.117^**	−0.040	−0.061^*	−0.063	—
6. Flanker Inhibitory Control and Attention Test	0.111^**	0.006	0.037	0.058	−0.079	—
7. Dimensional Change Card Sort Test	−0.087^**	0.018	0.005	0.017	0.150^**	−0.512^**	—
8. Short Penn Continuous Performance Test	−0.069	0.035	−0.009	0.014	0.111^**	−0.119^**	0.152^**	—
9. Raven’s Progressive Matrices	0.145^**	−0.041	0.074	0.050	−0.218^**	0.137^**	−0.195^**	−0.188^**	—
10. Delay discounting task	−0.137^**	−0.016	−0.056	−0.056	0.114^**	−0.056	0.058	0.064	−0.215^**	—
11. Picture Sequence Memory Test	−0.165^**	−0.028	−0.026	−0.061	0.242^**	−0.150^**	0.214^**	0.160^**	−0.293^**	0.081^*	—
12. Pattern Comparison Processing Speed Test	−0.144^**	0.010	−0.043	−0.041	0.143^**	−0.379^**	0.425^**	0.123^**	−0.157^**	0.047	0.204^**	—
13. List Sorting Working Memory Test	−0.140^**	−0.014	−0.038	−0.043	0.158^**	−0.138^**	0.209^**	0.145^**	−0.341^**	0.125^**	0.345^**	0.182^**	—
14. 9-Hole Pegboard Dexterity Test	−0.174^**	−0.073	−0.071	−0.127^**	0.107^**	−0.139^**	0.165^**	0.057	−0.154^**	0.119^**	0.194^**	0.192^**	0.108^**