Table 1.
Correlations and Descriptive Statistics
| MI | Male | FHAP | MEA | LI | LAA | ICT | WMT | FST | PIC | PWM | PS | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) MI | 1.00 | |||||||||||
| (2) Male | -0.06 | 1.00 | ||||||||||
| (3) FHAP | 0.13 | 0.01 | 1.00 | |||||||||
| (4) MEA | -0.07 | 0.00 | -0.16 | 1.00 | ||||||||
| (5) LI | 0.00 | -0.06 | 0.20 | -0.44 | 1.00 | |||||||
| (6) LAA | 0.24 | 0.01 | -0.08 | 0.30 | -0.43 | 1.00 | ||||||
| (7) ICT | -0.06 | -0.02 | -0.02 | 0.30 | -0.18 | 0.24 | 1.00 | |||||
| (8) WMT | 0.02 | 0.02 | -0.01 | 0.28 | -0.22 | 0.32 | 0.41 | 1.00 | ||||
| (9) FST | -0.12 | 0.01 | -0.06 | 0.12 | -0.12 | 0.17 | 0.54 | 0.26 | 1.00 | |||
| (10) PIC | 0.27 | 0.06 | 0.10 | -0.12 | 0.10 | -0.08 | -0.27 | -0.08 | -0.16 | 1.00 | ||
| (11) PWM | 0.22 | -0.04 | 0.14 | -0.08 | 0.12 | -0.05 | -0.19 | -0.08 | -0.15 | 0.73 | 1.00 | |
| (12) PS | 0.24 | -0.13 | 0.12 | -0.07 | 0.11 | -0.07 | -0.12 | -0.12 | -0.08 | 0.60 | 0.70 | 1.00 |
| M | 0.31 | 0.46 | 0.31 | 14.83 | 0.53 | 16.22 | 3.31 | 15.55 | 308.31 | 13.27 | 13.71 | 13.38 |
| SD | 0.46 | 0.50 | 0.46 | 2.12 | 0.50 | 1.32 | 0.68 | 2.28 | 67.18 | 2.90 | 3.18 | 2.90 |
Note. Numbers that are significant at p < .05 are in boldface. MI=marijuana initiation; FHAP=family history of alcohol problems; MEA=mother’s educational attainment; LI=low income; LAA=last age assessed; ICT=inhibitory control task; WMT=working memory task; FST= flexible shifting task; PIC=BRIEF-2 poor inhibitory control; PWM=BRIEF-2 poor working memory; PS=BRIEF-2 poor shifting.