The Behaviour Lab provides a flexible laboratory environment to study human movement behavior. In a 8.0x4.0x2.6 m room, several people can move freely while their motion can be captured with an IR camera system. In combination with the presentation of visual experimental stimuli on head-mounted displays, a stereoscopic powerwall or a three-sided CAVE including integrated eye movement capture, the laboratory offers ideal conditions for the investigation of perception-action coupling with high experimental control. Furthermore, it allows the observation of group processes by audio and video recording of the entire room.