Computerized brain training focused on increasing older adults’ visual processing speed reduced the likelihood of developing dementia by up to 48%. The lower likelihood of dementia pertained to people participating in the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) Study who were assigned to the intervention, rather than the control group. The participants who completed the speed of processing training experienced improved speed and attention, fewer depressive symptoms, and better health-related quality of life and functional performance. They also had lower than predicted health care costs and about half the risk of at-fault automobile crashes. The . . .