Table 1.

Experimental schedule

Group	Conditioning	Extinction	Test
Exp. 1
AAA	A → US	A	A
ABA	A → US	B	A
Exp. 2
AAA	A → US*	A	A
ABA	A → US*	B	A
Exp. 3
AAA	A → US	A*	A
ABA	A → US	B*	A

A context A; B context B

* Hippocampal lesion