Table 2.

Trial Types in Experiment 1

Arbitrary		Identity		Symmetry
A1→B2	FI-5s Pellet	A1→A2	FI-5s Pellet	B1→A2	EXT
A1→D2	EXT	A1→C2	EXT	D1→C2	EXT
C1→D2	FI-5s Pellet	B1→B2	FI-5s Pellet	B1→C2	EXT
C1→B2	EXT	B1→D2	EXT	D1→A2	EXT
		C1→C2	FI-5s Pellet
		B1→A2	EXT
		D1→D2	FI-5s Pellet
		D1→B2	EXT

Note. Sample stimuli are indicated by the numeral 1, comparison stimuli by numeral 2.