Fig. 1.

Task. A. Top shows sequence of images presented in a single trial. Bottom shows sequence of trial events. Each cue, button press, feedback series is presented 4 times in a single trial. M1 – movement 1, M2 – movement 2, etc. B. Sequence of sets, blocks and trials. Each set is composed of 6 sequence blocks and each block is composed of a single sequence, executed until the learning criterion is met (t1, t2, … refers to trial 1, trial 2, etc.). Subjects progress through a single sequence block by learning and executing the sequence correctly 6 times.