Table 2.

Baseline Operant Responding for Food Pellets in Male and Female Rats

	Food pellets (n)		Right lever (RL) responses		Left lever (LL) responses
Day	Male	Female	Male	Female	Male	Female
1	76.6 ± 4.4	78.1 ± 4.6	79.0 ± 4.4	79.2 ± 4.8	5.7 ± 1.7	5.1 ± 1.0
2	85.1 ± 3.6	74.1 ± 5.4	88.9 ± 3.6	81.1 ± 9.8	3.3 ± 1.4	1.5 ± 0.6
3	84.4 ± 3.6	73.9 ± 4.5	90.7 ± 3.2	82.3 ± 10.6	1.9 ± 1.0	1.4 ± 0.6