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. 2015 Feb;22(2):83–91. doi: 10.1101/lm.035840.114

Figure 2.

Figure 2.

(A) Illustration of the apparatus used for the simultaneous oddity discrimination task. Objects constructed from Legos (two identical and one odd object) were placed in the apparatus. Rats could then explore for a total of 5 min. Here, the odd object is in the right-most location, and the most difficult of the two task conditions is illustrated. The bottom half of the odd object is identical to the bottom half of the other two objects. (B) Illustration of the apparatus used for the visual discrimination task. The tank was filled with opaque water (dashed line indicates water level), and the rat could escape by finding a hidden platform located in front of the correct stimulus. The two stimulus items were separated by a divider. Rats were first trained on a black–white discrimination, then on two different black/white patterns, and finally on two different Legos (shown here).