Table 1. General timeline of experimental phases.
| Exp 1: Auditory CS | Pretraining (2 d) | PCA (5 d) | Habituation (2 d) | Tone Cond. (5 d) | Cond. Reinf. (1 d) |
| Exp 2: Compound CS | Pretraining (2 d) | PCA (5 d) | Cond. Reinf. (2 d) | ||
| Exp 3: Sequential CSs | Pretraining (2 d) | PCA (5 d) | Habituation (2 d) | Tone Cond. (5 d) | Cond. Reinf. (2 d) |
| Exp 4: Amphetamine and Auditory CSs | Pretraining (1 d) | PCA (5 d) | Habituation (2 d) | Tone Cond. (5 d) | Cond. Reinf. (1 d) |
| Exp 5: Amphetamine and Lever CSs | Pretraining (1 d) | PCA (5 d) | Cond. Reinf. (1 d) | ||
| Exp 6: Stress | Pretraining (1 d) | PCA (5 d) | Self-admin. (12 d) | Extinction (7–9 d) | Cond. Reinf. (1 d) |