Healthy Brain Study Through this app you as a participant in the Healthy Brain Study get questions about your daily activities. Every day in the week prior to their visit to the Radboud Campus you will receive several notifications per day on your mobile to indicate, among other things: - what your feeling is at that moment - what you are doing at that time - who you are with at that moment - where you are at that moment We use this digital diary to provide insight into which factors influence how we think, feel and do in daily life. It is therefore very important that you fill in the diary truthfully.