FigureĀ 4.
(A) Reaction time in a serial reaction time task (SRTT). An implicit learning effect is indicated by the reaction time increase between the last sequence block (6) and the following random block (7). (B) Explicit learning in the SRTT was tested after each block by manual retrieval of the sequence (repetition of the last 10 key presses) and revealed no significant difference between groups. Data are indicated as average value and single SD. Data for patients with idiopathic Parkinson's disease (IPD) and progressive supranuclear palsy (PSP) were taken from our earlier studies using identical methods.12 14 Asterisks indicate a significant difference for the comparison of blocks 6 and 7 (p<0.05, post hoc t test).