 --- Subjects will sit in a rack at a table in front of a 17 screen of an Eye Tracker system Tobii T60. The right part of the screen will be covered by a row of operating devices; two rotary knobs of different size, one turn switch and one simple push button. The construction of these devices is based on real ones on board the ISS. Integrated in three of these devices are force sensors 6D ATI Nano17, which register grip torques and forces while subjects manipulate the devices. 