This symposium considered the best methods for training. Is training best done within the context in which it will be used (e.g., perceptual speed, memory, exercise, technology use)? Is multiple system training the best method, and how do we determine what systems are affected? What are the physiological correlates of training and transfer of training? What is the impact of social engagement on cognition? How should we define successful training? How long do training effects have to last to be successful? Who are the best candidates for cognitive training and why?