The definition and measurement of disability : the work of the Washington Group (continued)

This presentation presents three methods of disability data collection: one method that highlights cognitive testing undertaken in 15 countries to ensure validity and to better understand how questions operate; another method which field tested the Washington Group questions versus extended questions in two countries to ensure internal consistency; and a SINTEF study in Zambia. It concludes with specific recommendations about disability data collection. It would be useful for people interested in the definition and measurement of disability