Table 1. Mean (±SEM) Number of Risky Choices for Each Probability Block Separated by ‘Wins' and ‘Losses'.
Wins | Stays | Losses | Shifts | |
---|---|---|---|---|
SCH 23 390 | ||||
1 μg | ||||
100% | 7.9 (0.5) | 7.1 (0.7) | ||
50% | 2.6 (0.5) | 1.8 (0.5) | 2.9 (0.5) | 0.9 (0.2) |
25% | 0.9 (0.3) | 0.9 (0.3) | 3.7 (0.7) | 1.2 (0.2) |
12.5% | 0.4 (0.2) | 0.2 (0.1) | 2.9 (0.8) | 1.2 (0.3) |
Saline | ||||
100% | 8.3 (0.3) | 7.5 (0.6) | ||
50% | 3.7 (0.6) | 3.2 (0.6) | 3.3 (0.5) | 0.5 (0.3) |
25% | 1.2 (0.3) | 0.8 (0.3) | 4.8 (0.6) | 1.3 (0.2) |
12.5% | 0.5 (0.1) | 0.2 (0.1) | 4.2 (0.7) | 1.7 (0.4) |
PD 128 907 | ||||
1.5 μg | ||||
100% | 6.8 (0.5) | 5.9 (0.7) | ||
50% | 2.3 (0.4) | 1.9 (0.5) | 3.3 (0.8) | 0.5 (0.3) |
25% | 1.6 (0.2) | 1.2 (0.3) | 3.4 (0.4) | 1.3 (0.2) |
12.5% | 0.5 (0.2) | 0.2 (0.1) | 3.9 (0.7) | 1.6 (0.3) |
Saline | ||||
100% | 8.3 (0.3) | 7.8 (0.5) | ||
50% | 3.9 (0.4) | 3.4 (0.5) | 3.4 (0.3) | 0.8 (0.3) |
25% | 1.0 (0.2) | 0.6 (0.2) | 5.1 (0.5) | 1.7 (0.3) |
12.5% | 0.4 (0.2) | 0.3 (0.2) | 4.7 (0.6) | 2.0 (0.4) |
‘Stays' are choices on the large/risky option immediately subsequent to a rewarded risky choice; ‘shifts' are those trials for which the small/certain option was selected following an unrewarded risky choice.