The "Brain Trainer of the Netherlands"
Mark Tigchelaar studied neuropsychology and specialises in how people can gain more from their brain. He is the author of four books and has trained more than 100,000 people in the principles of UseClark. UseClark is a company of which he is co-founder and director. It helps governments, businesses, educational institutions and individuals to deal with large amounts of information, through trainings and special software. Internationally, Tigchelaar is seen as the expert about our brain and productivity.