Table 2.
Design of Experiment 2
Group | Phase 1, Blocking A, 3 days | Phase 2, Blocking B, 3 days | Phase 3, retention interval | Phase 4, extinction | Test |
---|---|---|---|---|---|
Short–Ext A | 12A+/3AX+ | 12B+/3BX+ | 1 day | 400 A− | X |
Short–Ext B | 12A+/3AX+ | 12B+/3BX+ | 1 day | 400 B− | X |
Short–No Ext | 12A+/3AX+ | 12B+/3BX+ | 1 day | Context | X |
Long–Ext A | 12A+/3AX+ | 12B+/3BX+ | 22 days | 400 A− | X |
Long–Ext B | 12A+/3AX+ | 12B+/3BX+ | 22 days | 400 B− | X |
Long–No Ext | 12A+/3AX+ | 12B+/3BX+ | 22 days | Context | X |
Note. A and B = competing stimuli; X = target cue; + = footshock; Short = 1-day retention interval; Long = 22-day retention interval; Ext = extinction. Numbers next to the stimuli indicate the total number of trials or days in that phase. Slashes indicate interspersed trials.