Table 1.

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.