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Fig. S1. Neural responses following lever press decreased or increased similarly during forced response and free choice block.

Fig. S2. For each OFC neuron recorded, average baseline activity for the free choice block plotted as a function of baseline activity during forced response block.

Fig. S3. For each animal, extent of cortex sampled according to histological markers in Fig. 11 of Paxinos and Watson (2007).

Fig.S4. Normalized response time for forced response and free choice blocks of trials.

Fig. S5. Examples of single OFC units with phasic decreasing or increasing activity to lever presentation.

Fig. S6. Average responses for neurons that responded to lever presentation.

Fig. S7. Normalized response time of head entry into the pellet receptacle following lever press for forced response and free choice blocks of trials.

Fig. S8. Frequency of head entries into pellet receptacle following lever press.

Fig. S9. Frequency of head entries following lever press as a function of outcome for forced response and free choice trials.

Fig. S10. A comparison of behavioral and neural responses to certain outcome (2 pellets) in risk-preferring and risk-neutral rats during the free choice block of trials.

Fig. S11. Normalized firing rate of 28 decreasing neurons, aligned to time of first head entry into pellet dispenser following lever press.

Fig. S12. Normalized firing rate of 24 increasing neurons, aligned to time of first head entry into pellet dispenser following lever press.

Appendix S1. Supplemental methods.

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