In 2006, the Washington Group on Disability Statistics approved a “short set” of six disability questions for use in population censuses, covering the domains of seeing, hearing, walking, cognition, self-care and communication. The Group is currently pursuing the field-testing of an “enlarged set” of questions for use in household surveys, covering the 10 domains of vision, hearing, upper body, learning, cognition, affect, pain, fatigue and communication (United Nations, 2010).