NCT02525367.

Trial name or title	Online cognitive training in PD, multiple sclerosis, and depressed patients treated with electroconvulsive therapy
Methods	RCT vs active control condition (double‐blind) (n = 28).
Participants	Diagnosed with Parkinson's disease UKPDBB diagnostic criteria Problems in cognition with deficits in executive function lying between 1 and 2 SDs below the mean of the healthy Dutch population Stable medication
Interventions	Online computerised cognitive training (targeting executive functions, attention, working memory, and processing speed) over 8 weeks, 3 times a week for 45 to 60 minutes. Control group: active control condition of cognitive activities based on crystallised intelligence.
Outcomes	Primary outcomes: feasibility over 8 weeks as reported by participants on a 4‐point Likert‐type scale. Secondary outcomes: Cognitive functioning: Trail Making Task Subjective cognitive complaints: Cognitive Failures Questionnaire Executive functions: Stroop (Colour Word) Test Letter fluency, episodic memory: Rey Auditory Verbal Learning and Location Learning tests Measured at 8 and 12 weeks
Starting date	August 2015
Contact information	oa.vandenheuvel@vumc.nl
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