There is a strong connection between hearing loss and cognitive impairment, particularly dementia, in old age. The number of Canadians with dementia is expected to reach 9% of adults over the age of 60 by 2038. Given the high percentage of older individuals affected by each of these conditions, it is expected that many older adults will have dual hearing and cognitive loss, and that these losses will combine to affect their everyday functioning, communication, social engagement and quality of life. In addition, these combined losses can have secondary negative effects on individuals’ family members, and may lead to increased feelings of caregiver burden. The proposed research project will systematically examine whether individuals with dementia benefit from the use of hearing aids, and whether their family members can also experience benefits to their functioning and well-being.