A person with a physical, mental, or emotional condition lasting six months or more, who has difficulty in doing any of the activities that involve going outside of the home alone, for example, shopping or visiting a doctor’s office (Erickson & Lee, 2008).
Erickson, W., & Lee, C. (2008). 2007 disability status report: United States. Ithaca, NY: Cornell University Rehabilitation Research and Training Center on Disability Demographics and Statistics. http://digitalcommons.ilr.cornell.edu/cgi/viewcontent.cgi?article=1256&context=edicollect