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. Author manuscript; available in PMC: 2014 Jul 7.
Published in final edited form as: Exp Clin Psychopharmacol. 2014 Apr;22(2):166–175. doi: 10.1037/a0034741

Figure 2.

Figure 2

The effects of drug treatment on the habituation rate during the 10-session Drug Alone phase were compared with habituation rate during the last 5-session block of the Operant Level phase. The left column of Figure 2 shows within-session responding during the Operant Level phase plotted in 8-min epochs. The right column shows habituation rate. The top row (A) shows results from saline (SAL)-treated rats, the middle row (B) shows results from nicotine (NIC, 0.4 mg/kg)-treated rats, and the bottom row (C) shows results from methamphetamine (METH, 0.75 mg/kg)-treated rats. Asterisks indicate significant p < .05.

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