Fig. 2: Motor learning t-test.
From: Level of M1 GABAB predicts micro offline consolidation of motor learning during wakefulness

Data points in the violin plot depict the sum of changes in performance measured as the average inter-tap interval within correct sequences (tapping speed measured in keypresses/s) in the first block (T0) and in the block (T) where 95% of total learning occurred in each participant.