Table 1.
Phases and Conditions of Experiment 1
| Condition 1 | Condition 2 | |||||
|---|---|---|---|---|---|---|
| Target | Alternative | Target | Alternative | |||
| Phase I (Baseline) 30 sessions |
C1 | (No treatment) | VI 120 RT + VI 30 rT | - | VI 120 RT | - |
| C2 | (DRA) | VI 120 RT + VI 30 rT | - | VI 120 RT | - | |
| C3 | (NCR) | VI 120 RT + VI 30 rT | - | VI 120 RT | - | |
| Phase II (Treatment) 30 sessions |
C1 | (No treatment) | VI 120 RT + VI 30 rT | - | VI 120 RT | - |
| C2 | (DRA) | VI 30 rT | VI 30 RT | Ext | VI 30 RT | |
| C3 | (NCR) | VI 30 rT (VT 30 RT) | - | Ext (VT 30 RT) | - | |
| Phase III (Extinction) 30 sessions |
C1 | (No treatment) | VI 30 rT | - | Ext | - |
| C2 | (DRA) | VI 30 rT | Ext | Ext | Ext | |
| C3 | (NCR) | VI 30 rT | - | Ext | - | |
| Phase IV (Reinstatement) 10 sessions |
C1 | (No treatment) | VI 30 rT + RI RT | - | Ext + RI RT | - |
| C2 | (DRA) | VI 30 rT + RI RT | Ext | Ext + RI RT | Ext | |
| C3 | (NCR) | VI 30 rT + RI RT | - | Ext + RI RT | - | |
Note. Target = left or right side key (counterbalanced), Alternative = opposite side key. C1, C2, and C3 = Multiple-schedule component 1 (no treatment), 2 (DRA), and 3 (NCR), respectively. RT represents 3-s food presentations with a steady hopper light, rT represents 1-s food presentations with a flashing hopper light and key light. VI 120 and VI 30 = variable-interval 120-s and 30-s schedules, respectively. VT 30 = variable-time 30-s schedule. Ext = extinction for pecks to a lit key. RI = response-independent food at 2 and 8 s into each component. Condition 3 replicated Condition 1.