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Context-guided object discrimination task. Rats initially move into one of two environmental contexts (A or B) and explore without the presence of object stimuli for 20 s. Then two objects (X, Y) are placed in two corners of the context; the left–right positions of X and Y are pseudorandomized across trials. In Context A, object X is baited (+) and Y is not (−), whereas in Context B, object Y is baited and X is not.
