For more on statistical methods like the one used in King, Pan, and Roberts (2013) to estimate the sentiment of the 11 million posts, see Hopkins and King (2010).
Kwa zaidi kuhusu mbinu za takwimu kama ile iliyotumiwa katika King, Pan, and Roberts (2013) kukadiria maoni ya machapisho milioni 11, angalia Hopkins and King (2010).