Figure 1.

Mice with hippocampal lesions and GluR-A^-/- mice are impaired on a conditional version of the T-maze task in which floor inserts located in the start arm of the maze act as conditional cues, indicating which goal arm is to be rewarded. Mean percentage of correct responses ± SEM (untransformed, 10 trials per block) for mice with cytotoxic hippocampal lesions (white squares) or sham-operated controls (white circles) (A) and GluR-A^-/- mice (black squares) and wild-type controls (white circles) (B). During the last block of 10 trials of each experiment, the reward was delivered only after the animal had made a choice. Where error bars appear to be absent, the error is too small to be visible.