Table 1.

Percent choice during the final 30 choice trials

	Delay (% Choice)		Probability (% Choice)
	Immediate	Delayed	Certain	Uncertain
HAD1	44.9 ± 1.4%	55.1 ± 1.4%	49.2 ± 1.6%	50.8 ± 1.6%
HAD2	48.0 ± 1.4%	52.0 ± 1.4%	47.1 ± 1.1 %	52.9 ± 1.1%
LAD1	45.8 ± 1.0%	54.2 ± 1.0%	47.5 ± 1.3%	52.5 ± 1.3%
LAD2	47.6 ± 1.0%	52.4 ± 1.0%	46.4 ± 1.4%	53.6 ± 1.4%

Data shown are the mean ± SEM percent choice of the noted lever during the final 30 choice trials of delay discounting and probability discounting sessions. This demonstrates that the animals chose each lever with roughly the same frequency over this period, i.e. they had reached an indifference point. HAD1 n = 6, HAD2 n = 6, LAD1 n = 6, LAD2 n = 5.