Pavlovian second-order conditioning procedure used in Experiments 1A and 2A
| Group | Phase 1 | Phase 2 | ||
|---|---|---|---|---|
| First-order conditioning | Pretest tone | Second-order conditioning | Reminder trials | |
| PP | Light→food | Tone | Tone→light | Light→food |
| PU | Light→food | Tone | Tone, light | Light→food |
| UP | Light, food | Tone | Tone→light | Light, food |
The tone pretest occurred during the first half of the first session of Phase 2. Second-order conditioning and first-order reminder trials were randomly intermixed throughout the remainder of Phase 2. →, Paired presentation; , indicates explicitly unpaired presentation.