Per­ils and plea­sures of mood-sens­ing tech­nol­o­gy (New Scientist): “What hap­pens when we link films and music to devices that cap­ture small changes in our emo­tions? …The tech­nol­o­gy to tune your music to your run­ning rate has been around for a while, with devices such as the Nike+, and adap­tive playlis­ters like Songza can select music accord­ing…