Condition	Explicit motor timing (Paced and self-paced finger tapping [PFT and S-PFT]; repetitive wrist movements; time reproduction tasks)	Explicit perceptual timing (Time production/estimation and time discrimination tasks)	Implicit motor timing (Temporal expectation tasks; in musician's dystonia: time analysis of performed musical scales or finger tapping performance on keyboard)	Implicit perceptual timing (Temporal expectation tasks)
Parkinson's disease	• Reduced accuracy for both sub-second and supra-second intervals • Inconsistent changes in performance variability (increased on PFT tasks, decreased with time reproduction) • Inconsistent effects of dopaminergic medication on performance	• Reduced accuracy for suprasecond intervals (evidence of improvement with dopaminergic medication, which needs to be replicated)	• No obvious changes	• Not explored
Huntington's disease	• Reduced accuracy and increased performance variability observed more consistently for supra-second intervals, with changes observed in symptomatic and pre-symptomatic subjects (in the latter, performance changes increase as estimated years to onset decrease)	• Reduced accuracy for suprasecond intervals	• Not explored	• Not explored
Dystonia	• No obvious changes on PFT tasks	• No obvious changes	• In musician's dystonia, reduced accuracy of the affected hand • Variable finger tapping performance on keyboard, depending on finger affected	• In writer's cramp and cervical dystonia, reduced accuracy on temporal prediction of hand motion, but not of inanimate object motion
Tourette syndrome	• Reduced accuracy on time reproduction tasks for supra-second intervals, with performance variability influenced by dopamine D2 receptor blockers	• No obvious changes	• Not explored	• Not explored