Fig. S1. Plots of consumption by cost for individual mice. WT, wild-type; ‘rew’, reward.

Fig. S2. Activity patterns. (A) Average daily inactive lever presses (LP) at each ratio/cost. (B) Average daily within-meal lever-pressing rate. (C) Histogram of inter-response times (IRTs) as percentage of total IRTs in 1 s bins. (D) Histogram of post-reinforcement pauses (PRPs) in 10 s bins from 1 to 600 s (5 min). No significant genotype main effect or interactions observed. N = 8. WT, wild-type.

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