If an adult is unable to work, but does not qualify for disability payments because he or she does not have a history of employment, he or she may qualify for SSI. SSI is significantly different that disability insurance. SSI is need-based, meaning that a person must qualify medically (have a disabling physical or mental condition) and financially (he or she must have low income and little to now assets). There are also some situations where a child (under 18 years of age) may be evaluated in 6 “domains” (Acquiring and using information, Attending and completing tasks, Interacting with and relating to others, Moving about and using objects, Caring for self, Health and physical well-being) to see if the child is disabled.