 In determining a physical disability, common factors are the ability to sit, stand, lift, bend, and stoop.Mental disabilities are determined based on the ability to communicate with others, understand oral and/or written instructions from others, and get along with others.One who is able to sit for prolonged periods of time but not stand, lift, bend, or stoop may be disqualified by being able to perform some type of desk work, and one may qualify without such an ability because of intellectual capacity, education level, or previous work experience.