Fig. 3.

Hazard-related effect on RTs does not interact with other task parameters. A and B: RTs (cross-session means ± SE) were sorted according to the subjective hazard rates and the reward quantity (A) or the effort level (B) associated with the instruction cue. Whereas RTs were influenced by the reward quantity (***P < 0.001, 2-way ANOVA) and the effort level (###P < 0.001), no interaction was found between these parameters and the temporal preparation effect (P > 0.05). C: mean RTs as a function of hazard rate (on the current trial) were dissociated into 3 groups based on foreperiod of the preceding trial (short: <0.8 s, medium: 0.8–1.2 s, long: >1.2 s). No difference was observed between the 3 classes of trials (P > 0.05).