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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Alcohol. 2014 Feb 28;48(3):265–276. doi: 10.1016/j.alcohol.2014.01.005

Figure 2. Vigilance in pellet consumption as a product of fixed time interval length.

Figure 2

Ethanol-preferring (C57BL/6J; B6) and non-preferring (DBA/2; D2) mice that were provided access to a 5% v/v ethanol solution are shown. The total number of pellets (20 mg) presented to the mice during the 1-h sessions is noted below the X-axis. FT-0 was a massed feeding schedule whereby all pellets were presented in the food hopper at session onset (i.e., no schedule) whereas FT infinity (Inf) involved the delivery of one pellet at session onset with no additional reinforcement provided. Data plotted are the mean ± SEM percentage of pellets consumed during the final (10th) session at each interval for n = 5–6 mice/strain. ***p < 0.001 versus respective baseline (FT-0) value (all intervals ≥ 1 min for both strains); #p < 0.05 between strains within the noted interval. See text for additional experimental details.