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. 2012 Nov 26;3:194. doi: 10.3389/fphar.2012.00194

Figure 2.

Figure 2

Reinforcement deliveries during SA training. (A) Mean (±SEM) number of METH reinforcement deliveries per 90-min training session for ShA rats in Experiment 1. *p < 0.05 different from reinforcements delivered during Days 1–3 (Newman–Keuls tests). (B) Mean (±SEM) number of METH reinforcement deliveries per 90-min (Days 1–8) or 6-h (Days 9–16, open circles) training session for LgA rats in Experiment 2. Also shown are the mean (±SEM) number of METH reinforcements during the initial 90 min of the 6-h training sessions (Days 9–16, filled circles). *p < 0.05 different from reinforcements delivered during Days 1–8 (Newman–Keuls tests). Dotted line demarcates Phase 1 (left side) and Phase 2 (right side) of METH SA training. (C) Mean (±SEM) number of sucrose pellet deliveries per 30-min training session in Experiment 3. *p < 0.05 different from reinforcements delivered during Days 1–3 (Newman–Keuls tests).