TABLE 1.
Descriptive statistics and associations between demographics, predictor variables, the reward positivity (RewP), and risk-taking propensity
| Mean (SD)/% | 1. | 2. | 3. | 4. | 5. | 6 | 7. | 8. | |
|---|---|---|---|---|---|---|---|---|---|
| 1. Gender (% female) | 58.6% | ||||||||
| 2. Age | 22.47 (3.04) | 0.07 | |||||||
| 3. Risk-taking propensity (BART) | 1759.42a (301.85) | −0.27*** | 0.02 | ||||||
| 4. Total money won in cents (BART) | 801.40a (117.82) | −0.11 | −0.01 | 0.46*** | |||||
| 5. Total balloon explosions (BART) | 13.80a (2.43) | −0.28*** | 0.03 | 0.94*** | 0.23*** | ||||
| 6. Δ RewP | −3.77a (3.01) | −0.14* | −0.02 | −0.04 | −0.16* | 0.01 | |||
| 7. Lifetime dx of SUD (% hx) | 21.9%a | −0.13* | 0.14* | 0.06 | 0.07 | 0.05 | −0.09 | ||
| 8. Lifetime dx of AUD (% hx) | 28.9%a | −0.20** | 0.24*** | 0.06 | 0.05 | 0.08 | 0.04 | 0.38*** | |
| 9. Lifetime dx of MDD (% hx) | 30.9%a | 0.15* | 0.13 | −0.11 | 0.02 | −0.13 | 0.06 | 0.19** | 0.09 |
Note. N = 210. dx =diagnosis; hx =history.
a
To account for shared genetic variance in variable, reported descriptives reflect the mean/SD averaged across sibling pairs.
***
p < 0.001;
**
p < 0.01;
*
p < 0.05.