Do you use a mobility device at least 3 days/week? Do you weigh 180 lbs. or less and fit in an 18-in. wide and 16-in. deep seat? If so, you may be eligible to participate in a study to help researchers evaluate how effective and usable a robotic transfer assist device (HERL-RATD) is compared to a commercially available manual hydraulic (Hoyer) lift. Compensation provided.