And how can we measure this. Again I did some thinking and start to page through things. We can look for levels, the type, or frequency of cognitive activity by either self-report or by observation. The type and frequency of physical activity by self-report. We could train improved memory and organizational skills. We could train increased mental flexibility. We could also more broadly educate people about memory, aging, and coping strategies. And we could measure or try to facilitate the level of social activity that people are engaged in. So as I circumstanced, I had some ideas of what I might find and what would make sense here given the popular literature that sounded so promising and basically assigns people to doing a lot of mind games and a lot strategies very quickly.