Participants randomized into the Normal Activity group are encouraged to carry out their baseline daily activities, and do not have any study-related cognitive exercise expectations before surgery. These subjects still complete the same questionnaires and assessments as the Cognitive Exercise group throughout the study, however, are asked not to alter their normal daily routine of mental exertion (i.e. watching television, reading, puzzles, etc.) and are not permitted to subscribe to Lumosity while in the research study.