Experimental trial sequence.

Note. A. Time course of events during an experimental trial. B. Cue and response correspondence for the easy and the hard tasks. C. Illustration of parameter computation for the adaptive method. Data were taken from one participant who responded to ten consecutive stimuli. Red arrows indicate the event sequence in two trials. First, the difference between RT and RTh is calculated, then the FP is increased as a function of this difference leading to the RT decrease in the subsequent trial.