Questions 16 and 17. The results of questions 16 and 17 coupled with other questions will provide important data on the number of people whose activities are reduced because of a disability and the effect of the disability on their lives. The questions are slightly different to those asked in 2006. In question 16, vision and hearing impairments have been separated and there is a separate category for intellectual disabilities. The questions were chosen after pre-Census consultation with experts from the various disability umbrella bodies and government departments.