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. 2013 Mar 21;14(4):547–560. doi: 10.1007/s10162-013-0384-1

FIG. 1.

FIG. 1

The flow diagram for the behavioral task that was used in the study. Monkeys were trained to initiate a trial by pressing a lever. Initiating the trial could get them into a signal trial (top row) or a catch trial with no signal (bottom row). Monkeys were required to release lever in signal trials for reward and withhold lever release in catch trials. The reward used was dilute apple juice.