. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Psychopharmacology (Berl). 2014 May 22;231(24):4585–4594. doi: 10.1007/s00213-014-3607-1

Table 1.

Average number of active and inactive lever presses made, or infusions received during the last three days of cocaine self-administration.

Experiment	Treatment	Active lever presses	Inactive lever presses	Infusions
1	Saline	42.33 ± 4.10 (9)	0.89 ± 0.49	29.63 ± 0.75
1	CPP	39.07 ± 6.06 (9)	2.19 ± 1.19	26.33 ± 2.10
2	Saline	47.39 ± 12.74 (6)	0.78 ± 0.46	30.00 ± 1.72
2	D-serine	35.00 ± 5.18 (6)	3.06 ± 2.16	27.17 ± 2.11
3	Coc-ext	30.29 ± 4.39 (7)	3.81 ± 3.48	25.38 ± 2.89
	Coc-noext	39.33 ± 5.97 (7)	1.24 ± 0.57	27.05 ± 2.64
	Suc-ext	80.13 ± 6.53 (10)

Numbers in the parentheses are group sizes; Coc-ext = extinction of cocaine seeking, Coc-noext = cocaine self-administration without extinction, Suc-ext = extinction of sucrose seeking.