. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: J Exp Anal Behav. 2013 Aug 26;100(3):333–354. doi: 10.1002/jeab.46

Table 3.

Injections of saline or antagonists pyrilamine (pyr), ketotifen (keto), and ranitidine (ran) in mg/kg administered before sessions (presession) and response-dependent injections during sessions (during) across successive sessions in Experiment 2.

Session	Pyrilamine (pyr)		Ketotifen (keto)		Ranitidine (ran)
Session	Presession	During	Presession	During	Presession	During
1	saline	histamine	saline	histamine	saline	histamine
2	saline	histamine	saline	histamine	saline	histamine
3	saline	histamine	saline	histamine	saline	histamine
4	saline	saline	saline	saline	saline	saline
5	saline	histamine	saline	histamine	saline	histamine
6	saline	saline	saline	saline	saline	saline
7	1.00 pyr	histamine	1.00 keto	histamine	3.20 ran	histamine
8	saline	histamine	saline	saline	saline	saline
9	saline	saline	0.10 keto	histamine	3.20 ran	histamine
10	3.20 pyr	histamine	saline	saline	saline	histamine
11	saline	saline	saline	histamine	5.60 ran	histamine
12	0.32 pyr	histamine	saline	saline	saline	saline
13	saline	saline	0.01 keto	histamine	5.60 ran	histamine
14	0.10 pyr	histamine	--	--	--	--
15	saline	saline	--	--	--	--