Effects of RBX on the performance of 5-CSRTT. The graphs showed the effects of RBX (0, 3.0 and 10 mg/kg, N = 8 for each dose) on the performance of 5-CSRTT in the aspects of correct response rate (A), premature response (B), omission rate (C), correct latency (D) and magazine latency (E). Open bars depicted baseline vehicle controls, oblique lattice bars depicted RBX at 3 mg/kg, and black bars depicted RBX at 10 mg/kg. Values are presented as mean+SEM. Student-t test were used for each RBX treatment as compared with vehicle condition, * P < 0.05, ** P < 0.01.