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

Published in final edited form as: Behav Brain Res. 2012 Oct 22;238:119–123. doi: 10.1016/j.bbr.2012.10.012

Table 1.

Experimental design and number of responses and infusions (mean ± SEM) during the 2hr cocaine self-administration or yoked-saline sessions at baseline.

Group	N	Experimental Design		Baseline Responses		Infusions
		Training	Test	Active	Inactive
1	12	Cocaine	EXT	291.9 ± 31.8	25.1 ± 9.7	54.2 ± 5.8
2	6	Saline	EXT	18.5 ± 4.1	5.7 ± 1.3	N/A
3	11	Cocaine	No-EXT	273.3 ± 29.2	50.7 ± 12.1	48.6 ± 5.9
4	5	Saline	No-EXT	18.4 ± 1.7	8.2 ± 1.7	N/A