Two choice auditory detection task.

<p>(<b>A</b>) A trial is initiated by the rat's nosepoke (<i>center</i>), at which time the signal tone is either presented (<i>right</i>) or not presented (<i>left</i>). Licking at the right lickometer after signal presentation is a hit rewarded by water; failing to lick is a miss. On non-signal trials, licking to the left is a correct rejection (CR) rewarded by water; licking to the right is a false alarm (FA). (<b>B</b>) Hit (<i>gray solid</i>), CR (<i>black solid</i>), FA (<i>black dashed</i>) and misses (<i>gray dashed</i>) response latency histograms. Arrowheads indicate the average response latency for hits (<i>solid gray</i>), CRs (<i>solid black</i>), FAs (<i>open black</i>) and misses (<i>open gray</i>).