_____ Dear read­er, Time for Sharp­Brains month­ly e‑newsletter, dis­cussing lat­est think­ing, research and tools for life­long brain health and men­tal health. Enjoy! New thinking: Study finds clear–yet sur­pris­ing­ly different–benefits in 3 types of med­i­ta­tion-based men­tal training Tech­nol­o­gy and the Cog­ni­tion Crisis Think twice before tak­ing Ader­all for cog­ni­tive enhance­ment: It may actu­al­ly impair work­ing mem­o­ry and…