Just a few weeks of adaptive brain training in adults over 65 was linked to a 25% lower risk of dementia two decades later. Credit: Shutterstock Older adults who took part in a short program designed to sharpen how quickly they process visual information were less likely to develop dementia years later. The training, known as speed of processing training, teaches people to rapidly spot visual details on a computer screen and manage increasingly complex tasks in less time. Participants who