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. Author manuscript; available in PMC: 2012 Mar 10.
Published in final edited form as: Brain Res. 2011 Jan 6;1378:91–104. doi: 10.1016/j.brainres.2010.12.081

Figure 5.

Figure 5

Schematic illustration of the steps and stimuli used for training the SDR task. Correct completion of step 1 required monkeys to touch the sample stimulus at one of the four possible spatial locations, then to touch the central cue and finally to touch the stimulus at the same spatial location were the sample stimulus was presented. To correctly complete steps 2, 3, and 4 required the same sequence of responses; responding to the non-matching stimulus location(s) during the choice phase caused the screen to blank, the inter-trial interval (3 s) to begin and no reinforcer to be delivered. Step 5 added a 1 s delay between the central cue phase and choice phase.