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. Author manuscript; available in PMC: 2014 Mar 6.
Published in final edited form as: Neuron. 2013 Mar 6;77(5):969–979. doi: 10.1016/j.neuron.2013.01.007

Figure 1. Behavioral Task.

Figure 1

(A) Monkeys grouped four motion directions into two categories (the red and blue arrows) separated by a category boundary (the dashed black line).

(B) Delayed match-to-category task. A sample stimulus (650 ms) was followed by a delay (1,500 ms) and a test stimulus (650 ms). If the sample and test were in the same category, monkeys were required to release a lever before the test disappeared. If the test was a nonmatch, there was a second delay (150 ms) followed by a match (which required a lever release). In some trials, a saccade was required during the early delay period (300 ms after the start of the delay), directed either toward or away from the neuron’s RF. After the saccade, the monkey maintained gaze at the new fixation location for the remainder of the trial. The fixation point is indicated by the white spot in each panel, and the dotted outline spots in the test period panels (indicating the three possible fixation locations in the test period depending on the saccade condition).

(C) Monkeys’ average DMC task performance across all recording sessions was ~90% or better for all three saccade conditions. Error bars indicate the SEM.