Table 3.
Means and Standard Deviations (in Parentheses) for Measures Across the Duration of the Study
| Variable (Theoretical Range) |
Study Year
|
||||
|---|---|---|---|---|---|
| 0 | 2 | 4 | 6 | 8 | |
| IGT: Overall (−100 – 100) |
5.8 (28.6) | 10.8 (36.5) | 27.7 (40.8) | 41.5 (37.1) | 40.4 (35.2) |
| IGT: Ambiguity (−40 – 40) |
−2.9 (10.8) | −0.9 (14.6) | 2.6 (16.5) | 9.3 (15.8) | 6.7 (15.0) |
| IGT: Risk (−60 – 60) |
8.7 (23.5) | 11.6 (28.7) | 25.1 (28.1) | 32.2 (26.0) | 33.7 (25.2) |
| WASI: Two-Scale IQ (40 −160) |
114.0 (10.5) | 114.3 (9.6) | 117.9 (9.8) | 118.5 (9.9) | 115.4 (10.5) |
| BIS Total (7 – 28) |
19.4 (3.3) | 19.8 (3.8) | 19.8 (3.9) | 20.6 (3.8) | 21.3 (3.6) |
| BAS Total (13 – 52) |
39.9 (4.8) | 39.6 (4.6) | 41.3 (4.0) | 40.1 (4.5) | 39.6 (4.8) |
| BIS Subscale: Anxiety (5 – 20) |
14.2 (2.7) | 14.6 (3.0) | 14.6 (3.1) | 15.1 (2.9) | 15.7 (2.8) |
| BIS Subscale: Fear (2 – 8) |
5.2 (1.3) | 5.2 (1.5) | 5.2 (1.5) | 5.6 (1.6) | 5.6 (1.5) |
| BAS Subscale: Drive (4 – 16) |
10.5 (2.3) | 10.4 (2.3) | 11.2 (2.0) | 10.7 (2.1) | 10.4 (2.5) |
| BAS Subscale: Fun-Seeking (4 – 16) |
12.1 (2.0) | 11.8 (2.0) | 12.4 (2.1) | 12.0 (2.0) | 11.6 (2.2) |
| BAS Subscale: Reward Responsiveness (5 – 20) |
17.3 (1.9) | 17.4 (1.8) | 17.7 (1.5) | 17.4 (2.0) | 17.6 (1.6) |
Note. IGT = Iowa Gambling Task. WASI = Wechsler Abbreviated Scale of Intelligence. BIS = Behavioral Inhibition System. BAS = Behavioral Activation System.