Skip to main content
. Author manuscript; available in PMC: 2011 Dec 7.
Published in final edited form as: Exp Clin Psychopharmacol. 2011 Jul 18;19(6):409–419. doi: 10.1037/a0024682

Figure 2.

Figure 2

(a) Cumulative pellets earned under free feed conditions for the first baseline and partner pairing and (b) total active and inactive lever presses for the first baseline and partner pairing (n = 6). (c) Cumulative pellets earned for the second baseline and partner pairing and (d) total active and inactive lever presses for the second baseline and partner pairing. There was a significant main effect of lever. (*p < .01; **p < .001 baseline compared to partner pairing at each time point or active compared to inactive and baseline active compared to partner pairing active lever presses). Data expressed as mean ± SEM.