Table 1.

Design for Experiments 1 and 2.

Exp	Lever training	Conditioning	Conditioning	Test
1	CXT A/CXT B	CXT A: CS1+/CS2−	CXT B: CS1−/CS2+	CXT A/B: CS1−/CS2−
2	CXT A/CXT B	CXT A: CS1+/CS2−	CXT B: CS1−/CS2+	CXT A/B: CS1−/CS2−