For well over three decades, researchers have been studying the brains of nuns. The results are encouraging, especially to those who are trying to prove that brain games work. A number of elderly nuns showed no symptoms of Alzheimer's even though autopsies revealed that their brains had all the signs of advanced disease. Researchers discovered one common thread among these women - they all wrote idea-dense, grammatically complex prose early in their lives. While the nuns weren't using software to improve their brains, many believe brain games will bear the same fruit that complex writing bore for these nuns. From baby boomers striving to improve the quality of their lives to schools and parents trying to give their kids an edge in the new race called childhood, brain games are in high demand. Worldwide we've spent well over $1 billion on brain games, but do they deliver? From The Boston Globe Magazine: Do brain games work?