The current study adresses the effect of two different computer-based cognitive trianing programmes on attention and executive functions in patients with Parkinson's disease.

The current study adresses the effect of two different computer-based cognitive training programmes (Brain+ Evolution and Scientific Brain Training PRO) on attention and executive functions in patients with Parkinson's disease. The patients are assigned to one of three groups. Two training groups with each their programme, and a control Group. The training groups will train at home for 8 weeks with follow-ups every second week. The control group will not train at home, but will also receive a follow-up with computer-based stimuli (computerized Card game) every second week, to minimize the possibility that a possible effect is due to the follow-up's with a professional, and not due to the computer training at home.

Inclusion Criteria:

• Patients with Parkinson's disease AND
• Montreal cognitive assesment (MOCA)-score between 22-28
• Motorically cabable of using an iPad
• Not receiving antipsychotic medicine
• No comorbid diseases which might influence the level of executive functioning, for an example ADHD or acquired brain damage

Exclusion Criteria:

• People without Parkinson's disease
• Parkinson's patients not included in the above inclusion criteria

Before and after the intervention period, the patients are tested in a neuropsychological battery to asses their executive functioning. The tester is blinded to the Group allocation of the patients.