Figure 2. Results of the difficulty ratings (Experiment 1) as a function of the overlap level.

The four notes of the target melody are represented by filled triangles. A] Difficulty ratings for one participant of the four non-visual sessions (black lines) and the four visual sessions (red lines). B] Difficulty ratings for musicians (dotted lines) and non-musician (solid lines) for sessions with visual cues (V) and without visual cues (NV) averaged across repetition and context: error bars show one standard error. C] Difficulty ratings for INC (dotted) and DEC (solid) blocks averaged across repetition and groups.