1. A method for producing interactive visuo-motor and/or interactive oculomotor non-verbal stimuli in a subject, the method comprising: displaying first and second graphical objects on a display, the second graphical object comprising a graphical reference marker splitting the second graphical object into a first side and a second side; changing a display position of the first graphical object, according to kinematical predefined rules, under visuo-motor voluntary control of a subject; and changing a visualization of the second graphical object according to the display position of the first graphical object and one or more parameters, the one or more parameters depending on a performance score for the subject based on the display position of the first graphical object relative to the graphical reference marker.