Figure 2
From: The role of auditory feedback in the motor learning of music in experienced and novice performers

(Left) Example of session order, which was rotated across participants. (Right) A description of the experimental variables modulated across the different learning conditions is provided and applied to the real data for simplicity. Mean error frequency was observed in the four experimental conditions as a function of the sensory modality involved in music learning. M + = motor practice, M − = lack of motor practice, A + = auditory feedback, A − = lack of auditory feedback. Error bars indicate standard errors.