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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Addict Biol. 2013 Apr 3;19(5):838–848. doi: 10.1111/adb.12054

Figure 2. Baseline Preference.

Figure 2

Mean percentage (±SEM) of free choice trials (14 per session) on which cocaine was chosen, across the 5 sessions of the choice phase. * p < 0.05 different from 50% (i.e. no preference).