example, in most known systems there is no way to instantaneously gauge one's progress against a prior use of the vehicle while it is in operation.
Video arcade games are another technology providing a certain degree of user feedback. Arcade games are typically placed in public areas such as arcade halls, theatres, airports and other such areas where the users can occupy time and entertain themselves by playing the game. Arcade games utilizing video displays have been around for some time now, beginning with the simplistic game of bouncing a ball across a line with paddles known as "Pong". However, with the passage of time, video arcade games have become ever more sophisticated and realistic.
Since arcade games have housings which occupy a limited space, the computer equipment of thedirectors for two Swedish psychiatric clinics and a contact person for a patient advocacy group for people living with BD were contacted and informed about the study. After permission was granted to conduct the study, the nurses at two community psychiatric clinics and the contact person for the patient advocacy group were informed and asked to make the initial contact with persons meeting the inclusion criteria and to inform them of the study. Those persons who declared an interest in participating then received verbal and written information from the first author about the study and what it would mean to participate. Written consent was given from the informant before the interview, made by the first author (MR). In accordance with the leading principle of openness access to the