Table 2.

Consummatory measures during FR and RR reinforcement schedules. Ethanol intake and lick run dynamics are depicted for mice permitted either intermittent sipper tube access on a FR4 schedule or 30-min continuous access following the completion of a RR4 or RR8 schedule. Values are the mean ± SEM of the last 3 sessions on each reinforcement schedule.

	Reinforcement Schedule
	FR4	RR4	RR8
Total Session Intakes
Ethanol Dose (g/kg)	.14 ± .03	.27 ± .04^*	.48 ± .07^***^, ^###
Total Licks	61 ± 12	167 ± 17^***	220 ± 27^***^, ^#
10E Volume (ml)	.048 ± .009	.093 ± .013^*	.172 ± .023^***^, ^###
Mean Lick Run Measures
Run Frequency	2.2 ± 0.4	5.9 ± 0.4^***	6.5 ± 0.5^***
Run Size (licks)	19 ± 3	26 ± 2^**	32 ± 3^***^, ^#
Largest Run (licks)	30 ± 5	57 ± 6^***	71 ± 8^***^, ^#
Inter-Run Interval (min)	6.5 ± 0.5	4.1 ± 0.5^***	4.1 ± 0.4^***
Run Duration (min)	0.29 ± 0.05	1.06 ± 0.15^***	0.90 ± 0.10^***
Lick Run Rate (licks/min)	357 ± 59	173 ± 28^***	223 ± 37^**
1^st Lick Run Measures
Run Size (licks)	16 ± 2	23 ± 2	43 ± 6^***^, ^#
Run Duration (min)	0.30 ± 0.07	0.87 ± 0.15^**	0.85 ± 0.12^**
Lick Run Rate (licks/min)	340 ± 62	162 ± 41^**	230 ± 42^*
Latency to 1^st Run (min)	13.7 ± 1.9	6.8 ± 0.9^***	6.5 ± 0.7^***

p < 0.05

^**

p < 0.01

^***

p < 0.001 versus the FR4 schedule

p < 0.05

^###

p < 0.001 versus the RR4 schedule.