Table 1.

Schematic illustration of the construction of stimuli for experiment 1

Stimulus pair		Stimulus feature
		1	2	3	4
1	Sample	K	C	H	G
	Novel	M	A	D	P
2	Sample	D	H	F	K
	Novel	B	O	L	J
3	Sample	C	J	E	F
	Novel	M	N	G	I
4	Sample	B	D	I	A
	Novel	N	G	P	L

A capital letter denotes a stimulus feature; there are 16 possible features, A–P. Each stimulus is composed of four features. No stimulus pair (sample and novel) shares any features. No stimulus is replicated within the set of eight stimuli.