Do brain games work? (The Boston Globe): “There’s intense interest?—?and the poten­tial for big money?—?in the world of brain games. Lumosity…claims 60 mil­lion users…The mar­ket for Lumos­i­ty and com­peti­tors like Cogmed and Posit Sci­ence is grow­ing 25 per­cent a year, accord­ing to Sharp­Brains, a neu­ro-well­ness research firm. Sharp­Brains pegged 2013 spend­ing on brain fit­ness hard­ware…