Fig. 3.

The performance of the animals in the approach-to-target task was quantified by measuring the mutual information between the target and response locations. The mean and SD of these values are plotted across sound duration for the extensive lesion (A) and restricted lesion (B) groups both before (white bars) and after (gray bars) the cortex had been aspirated. In keeping with the change in the percentage of correct responses, the MI values were lower for shorter sound durations. The MI values were significantly reduced in both groups following the lesions, but a much larger effect was found in the extensive lesion group. **P < 0.01, *P < 0.05.