. Author manuscript; available in PMC: 2013 Sep 1.

Published in final edited form as: Behav Brain Res. 2012 Jun 18;234(1):100–106. doi: 10.1016/j.bbr.2012.06.010

Table 1.

Experimental design and number of responses and infusions (mean ± SEM) during 1hr cocaine self-administration or yoked-saline sessions at baseline.

Group	N	Experimental Design			Baseline Responses		Infusions
Group	N	Training	Cues	Test	Active	Inactive	Infusions
1	8	Cocaine	Paired	EXT	378.1 ± 59.5	61.5 ± 15.5	9.6 ± 0.4
2	7	Saline	Paired	EXT	21.9 ± 4.8	9.8 ± 3.0	N/A
3	8	Saline	Unpaired	EXT	19.9 ± 3.6	8.2 ± 2.7	N/A
4	4	Cocaine	Paired	No-EXT	249.4 ± 56.9	59.2 ± 7.9	9.3 ± 0.3
5	4	Cocaine	Unpaired	No-EXT	153.3 ± 23.5	31.7 ± 10.8	9.4 ± 0.1