Figure 6. Design of Experiment 3. Mice were trained to collect food reward from two pairs of arms of a plus-maze on separate trials. The pairs were formed from arms that formed a right-angle (e.g., A and B, left panel; C and D, middle panel). While exploring one pair of arms, access was blocked to the other pair. Mice received probe trials (right panel) in which they were placed in an arm (e.g., arm A) and were allowed to explore the previously paired arm (e.g., B, primed arm) or the previously unpaired arm (e.g., D, unprimed arm). Mice received an equal number of probe trials starting from each arm of the maze.