A man with mental illness, lives in a psychiatric care facility with other residents. He has his own room where he prefers to be almost all the time. He stays a maximum of ½ hour at a time in common areas and is considered restless. The man loves the Protac SenSit^® ball chair and stays in it longer than he has wanted to sit in other furniture. The staff experience that he has less motor restlessness. He wanders around less of the time and with less intensity. He can sit in the common room for longer time periods than before. The chair allows him to retire to a safe spot and get sensory stimulation without falling asleep. This means that he can remain closer to ongoing activities and that he is more alert and ready for activity than if he had received sensory stimulation while lying down.