Food cup behavior exhibited by rats in the four control groups
| Group | Mean responding during conditioning (sec) | Discrimination ratio during test session |
|---|---|---|
| hM4Di-VEH | 0.4 ± 0.1 | 0.69 ± 0.09 |
| GFP-CNO | 0.6 ± 0.1 | 0.74 ± 0.19 |
| VEH-CNO | 0.6 ± 0.3 | 0.66 ± 0.19 |
| VEH-VEH | 0.5 ± 0.1 | 0.76 ± 0.11 |