Table 1.
Descriptive statistics for animals that met criteria of two-fold more lever pressing on the active versus inactive lever.
| % Meeting criteria | Active lever presses (last 3 days) | Inactive lever presses (last 3 days) | Infusions (last 3 days) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean | Max | Min | Mean | Max | Min | Mean | Max | Min | ||
| Experiment 1: discrete drug cues | ||||||||||
| 0.075 mg/kg heroin dose-discrete drug cues | 100 (16/16) | 92.2 | 260.3 | 19.7 | 4.8 | 14.0 | 0.3 | 29.6 | 47.0 | 16.0 |
| 0.03 mg/kg heroin dose-discrete drug cues | 96 (24/25) | 265.8 | 2303.0 | 24.3 | 9.3 | 53.7 | 1.0 | 45.3 | 152.0 | 16.0 |
| Experiment 2: discriminative drug cues | ||||||||||
| 0.075 mg/kg heroin dose-discriminative drug cues | 93.8 (15/16) | 86.4 | 274.0 | 21.0 | 9.4 | 26.0 | 2.0 | 32.4 | 58.0 | 15.0 |
| 0.03 mg/kg heroin dose-discriminative drug cues | 75 (12/16) | 369.2 | 2335.0 | 7.7 | 8.6 | 28.3 | 1.7 | 66.3 | 215.7 | 6.7 |