A method of evaluating the driving behavior in a vehicle. Electrical coupling is provided by electrical contacts mounted with substantially the same arrangement and number on both surfaces of the substrate. The disclosed embodiments may further enable individuals to build new virtual worlds within a framework, and allow third party users to better interact with those worlds. With such a configuration, it is possible to increase the speed of fast playback, and realize smooth playback picture. The power interruption switch is opened to prohibit the second power supply circuit from being supplied with electric power in the sleep mode.