FIGURE 5.

Experiment 1, stage 3. Intra-trial change in lighting conditions. Performance on the forced-choice alternation rule when there was a change in the lighting conditions between the sample and choice phases. The line graph shows the mean percentage correct responses in blocks of 12 trials for intermixed trials when either there was no change in lighting between sample and choice (light/light, i.e., standard) or when there was a switch to running in the dark between the sample and choice (light/dark). For the final two sessions, this light to dark switch was combined with maze rotation (light/dark + rotation). Error bars refer to ±SEM. RSC, retrosplenial cortex lesions; Sham, surgical controls.