Table 1.
Design of Experiment 1
| Group | Phase 1,Blocking A, 3 days | Phase 2,Blocking B, 3 days | Test |
|---|---|---|---|
| Blocking | 12A+/3AX+ | 12B+/3BX+ | X |
| Control | 12C+/3AX+ | 12D+/3BX+ | X |
Note. A, B, C, and D = competing stimuli; X = target cue; + = footshock. Numbers next to the pairings indicate total number of trials in that phase. Slashes indicate interspersed trials.