Table 1.

Pellets per minute.

	p = 17%	p = 14%
Marmoset, gambler	2.69 ± 0.37	1.23 ± 0.66
Marmoset, non-gambler	7.84 ± 0.91	6.91 ± 0.89
Rat, gambler	2.79 ± 0.27	2.54 ± 0.32
Rat, non-gambler	3.15 ± 0.19	3.73 ± 0.26

Mean (±SEM) number of pellets earned per minute. Subjects are the same as in Figure 2. On final sessions at very low probability values (p = 17%, 14%), the amount of pellets obtained by “non-gambler” marmosets was considerably higher compared to “gambler” marmosets and rats of both subpopulations.