Not mentioned in the article, but since you asked: Cognitive training outperforms crossword puzzles: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjour

Not mentioned in the article, but since you asked: Cognitive training outperforms crossword puzzles: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0061624 http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjourna... Crossword puzzles aren't protective against cognitive decline: http://portalsaudebrasil.com/artigospsb/idoso068.pdf http://portalsaudebrasil.com/artigospsb/idoso068.pdf [PDF link]