http://books.google.com/books?id=OXS8XBwP0coC&lpg=PA85&ots=syZTCKEPGt&dq=analytical%20thinking%20ability%20age%20decline&lr&pg=PA85#v=onepage&q&f=false http://b

http://books.google.com/books?id=OXS8XBwP0coC&lpg=PA85&ots=syZTCKEPGt&dq=analytical%20thinking%20ability%20age%20decline&lr&pg=PA85#v=onepage&q&f=false http://books.google.com/books?id=OXS8XBwP0coC&lpg=PA85&#... one source amongst many, note the # of achievements peaks around 40 not 20 http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6X08-46P4PSB-1K&_user=10&_coverDate=08%2F31%2F1997&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1583264144&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=fb9fa6a7c29afda6bd2aac0352d624ae&searchtype=a http://www.sciencedirect.com/science?_ob=ArticleURL&_udi... ". In some cases (e.g., bisection), performance differences between the older participants and students nearly 50 years younger used in other studies were negligible." and so on and so forth, this is by no means a well solved problem that says, young people are smarter derp