Inclusion Criteria:  Diagnosis of idiopathic PD (according to the United Kingdom PD Society Brain Bank Clinical Diagnostic Criteria) (for PD participants) Good response to levodopa (improvement on the UPDRS-III scale) (for PD participants) Hoehn and Yahr stage: < or = 3 (for PD participants) Absence of severe tremor (for PD participants) Absence of dyskinesia (for PD participants) Between 18 and 85 years old (for all participants) Normal or corrected-to-normal vision (for all participants)  Exclusion Criteria (for all participants):  Severe cognitive impairment (Score of <21/30 with the Montreal Cognitive Assessment (MoCA)) MRI-incompatible metal device in the body History of major psychiatric or neurological disorder (other than PD for the patient group) Personal or family history of epilepsy History of substance use disorder (except nicotine) Untreated or unstable medical conditions that could interfere with cognitive functioning Undergoing any drug treatment that can significantly alter task performance or neural activity