Figure 2.

(A) Number of trials to performance of eight conditioned responses within a 10-trial block on two consecutive days of trace conditioning. Aged control (Veh) rabbits required significantly more trials to achieve this criterion compared with aged galantamine-administered (Gal) and young rabbits (*significant difference). (B) Mean percentage of conditioned responses for each day of trace conditioning. Aged galantamine-administered (Aged/Gal) rabbits performed significantly more conditioned responses over the course of training compared with aged saline control (Aged/Veh) rabbits. Aged/Gal and young rabbits did not differ significantly on the final day of training. No significant difference was observed between young galantamine-administered (Young/Gal) and young saline control (Young/Veh) rabbits.