Fig. 5. (A) Learning performances [assessed by percentage of antennal projection responses (APRs)] were tested for up to 30 min after five training trials with simultaneous conditioning (N=18). A high percentage of APRs to the visual cue was retained 5 min, 10 min, 20 min and 30 min after training and showed no statistical difference in these intervals. The responses at these times were significantly different from pre-training and control test levels, which were not significantly different. (B) Tests for long-term memory of APRs (N=9). After training, APRs to the green light cue were tested for up to 72 h. APRs were significantly different from those at pre-training even at 72 h, showing that cockroaches retained this learned behavior for long periods. The response from 30 min to 1 h decreases by almost 30% but remains stable for up to 72 h. The response at 72 h has decreased to almost 40%, which is half of that observed at 30 min.