Summarized data of behavioral performance during the training and test phases of the operant task.

<p>(a) Time changes in the mean correct rates in the training phase (<i>left</i>) and the test phase (<i>right</i>). (b) Same as a, but for the mean omission rates, <i>i</i>.<i>e</i>., a percentage of trials in which the rats did not respond within the time limit. (c) Same as a, but for the mean latencies to respond. Error bars represent SEMs for 22 rats.