Supplementary Figure 2: Memory probes can provide multiple sources of value information.

As shown in Figure S1, probes can trigger the recall of both the trial on which the probed image was received, and other trials in the same context. The payoff probabilities are designed such that during the initial 10 trials in each room, one deck is more likely to pay out a reward than the others, but that deck is not likely to pay out well in the last twenty trials of that room (Figure 2). Thus, the participant is likely to choose a different deck for the final twenty trials of each room than she did for the first 10 trials. This design feature allows us to distinguish effects of the reminded context from that of the reminded trial. a. First, each object image uniquely identifies one choice trial. b. This object image is episodically associated with the choice made, and reward received, on the given trial. c. However, the value information carried by subsequent retrievals of contextually-related trials is more likely to reflect trials on which a different option was chosen, and rewarded. We hypothesized that choices after a reminder would be influenced both by the rewards received on the reminded trial and the rewards received across the reminded context room.