| Conditioning and Generalization Stimuli |
| |
CS+ |
|
| Phase |
CS- |
C1 |
C2 |
C3 |
C4 |
Coterminated
with UCS |
Not Coterminated
with UCS |
ITI |
| Preacquisition |
6 |
- |
- |
- |
- |
0 |
6 |
6 |
| Acquisition |
12 |
- |
- |
- |
- |
9 |
3 |
12 |
| Generalization test |
12 |
12 |
12 |
12 |
12 |
6 |
6 |
12 |
Note: CS−=conditioned safety cue; CS+=conditioned danger cue; C1, C2, C3, and
C4=generalization stimulus classes 1, 2, 3, and 4; UCS=unconditioned stimulus;
ITI=inter-trial intervals. During the generalization test, the CS+ continued to be
reinforced with shock to avoid extinction of the conditioned response during the
generalization sequence. |
