2.  Treadmill interfaced to large screen Virtual Reality environments  Improving walking in patients with pain or post-stroke  The effect of visual flow on walking speed  The effect of audio cue tempo on walking speed

3.  Novel approaches to head tracking in VR for patients with neck and shoulder pain  Computer-based assessment of motor deficits in Parkinson’s Disease  VR and computer games to promote and facilitate exercise

4.  Powell, W. A., Stevens, B., Hand, S., & Simmonds, M. J. (2010). Sounding Better: Fast Audio Cues Increase Walk Speed in Treadmill-Mediated Virtual Rehabilitation Environments. Studies in Health Technology and Informatics, 154, 202- 207.  Powell, V and Powell, W (2010), A novel approach to camera tracking in a VR reaching task for patients with shoulder and neck pain. To be presented at CyberTherapy 2010, Seoul, Korea.  Powell, W., Stevens, B., & Simmonds, M. (2009). Treadmill Interface for Virtual Reality vs. Overground Walking: A Comparison of Gait in Individuals with and without Pain. Studies in Health Technology and Informatics, 144, 198-203.  Powell, W. (2008, April 5-10). Virtually Walking? Developing Exertion Interfaces for Locomotor Rehabilitation. Paper presented at CHI, Florence, Italy.  Powell, W., & Simmonds, M. (2008). Virtual reality: A healthy perspective (Editorial ). International Journal of Therapy and Rehabilitation, 15(11), 480-481.  Powell, W. A., Stevens, B., Hand, S., & Simmonds, M. J. (2008). The influence of visual and auditory cues on pain and movement in a treadmill-mediated virtual environment. Paper presented at Pain, Mind and Movement II - An Official Satellite Symposium of the XIIth World Congress on Pain., Dublin, Ireland.  Powell, W., Stevens, B., Hand, S., & Simmonds, M. J. (2007). Software Gearing in a Virtual Environment: The Effect on Perception of Optic Flow. Annual Review of CyberTherapy and Telemedicine, 5, 99-106.  Powell, W., Hand, S., Stevens, B., & Simmonds, M. J. (2006). Optic Flow with a Stereoscopic Display: Sustained Influence on Speed of Locomotion. Annual Review of CyberTherapy and Telemedicine, 4, 65-70.