Inclusion criteria	Exclusion criteria
(i) Age between 50 and 85 years	(i) Clinical PDD diagnosis or outcomes in the Pill-Questionnaire indicating caregiver dependency
(ii) PD diagnosis according to the UK Brain Bank Criteria	(ii) Depression (operationalized with Beck Depression Inventory II ≥20 points)
(iii) Self-reported cognitive impairment assessed with the Subjective Cognitive Impairment questionnaire and/or objective cognitive impairment assessed with the Montreal Cognitive Assessment <26 points	(iii) Acute suicide tendency
(iv) PD-MCI according to Movement Disorders Society (MDS) task force Level-II criteria	(iv) Severe comorbidities affecting life expectancy, medication, or quality of life
(v) At least 1 year since PD diagnosis	(v) Severe fatigue
(vi) Stable medication within 4 weeks before screening	(vi) Prominent impulse control disorder or dopamine dysregulation syndrome
(vii) Written informed consent	(vii) Acute psychosis or psychotic episode in the last 6 months before study participation
	(viii) Dementia medication
	(ix) Participation in other treatment studies within the last 2 months before study participation
	(x) Deep brain stimulation
	(xi) Pregnancy or nursing period