The hardware consists of a standard PC, a video graphics card, a sound card, headphones and a separate numeric keyboard to measure behavioural responses. In the VR test part, we used a 19" CRT monitor and shutter glasses for stereoscopic vision. A 27" monitor and 3D vision glasses (Nvidia, Santa Clara, CA, USA) replaced them in the VR game part. A robotic pen (Phantom omni haptic device, Sensable technologies, Wilmington, USA) was used as a pointer using the right hand for assessment activities and the paretic left hand when playing the VR game for intervention.