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. Author manuscript; available in PMC: 2017 Mar 17.
Published in final edited form as: Psychopharmacology (Berl). 2014 Apr 3;231(20):4019–4029. doi: 10.1007/s00213-014-3541-2

Figure 2. SA in animals on a multiple schedule receiving alternating 5 min access periods to alcohol and nicotine or to nicotine or alcohol alone.

Figure 2

A. Mean (± sem) number of alcohol (left) and nicotine reinforcements (right) earned by animals receiving alternating access to alcohol alone (Alc alone), nicotine alone (Nic alone) or alcohol and nicotine together (Nic and Alc). B. Mean (± sem) number of lever presses for alcohol (left) and nicotine (right) made by animals receiving alternating access to alcohol alone (Alc alone), nicotine alone (Nic alone) (white bars) or nicotine and alcohol (Nic and Alc) (black bars). * Significantly different from (p<0.05).