700,000 Facebook ọrụ na-etinye n'ime nnwale na o nwere ike ịbụ gbanwere obi ha. Ndị sonyere na-na-ekwenyere na ọmụmụ kwesịghị irubere-atọ ndị ọzọ usoro ziri ezi-elekọta ùgwù.
N'ihi na otu onye izu na January nke 2012, ihe dị ka 700,000 Facebook ọrụ e enịm ke nnwale na-amụ obi contagion, ókè nke ihe mmadụ na mmetụta uche na-impacted site na mmetụta uche nke ndị ha na-emekọ ihe. M na-atụle ihe a n'Isi nke 4, ma Aga m nyochaa ya ọzọ ugbu a. Ndị na-mmetụta uche Contagion nnwale ndị e tinye n'ime anọ dị iche iche: a "negativity belata" otu, n'ihi na onye posts na-adịghị mma okwu (eg, mwute) e enweghị usoro egbochi si pụtara ná News Feed; a "positivity belata" ìgwè onye posts na nti okwu (eg, obi ụtọ) e enweghị usoro egbochi; na abụọ akara dị iche iche. Na akara nke "negativity belata" otu, posts e enweghị usoro egbochi n'otu ọnụego dị ka "negativity belata" otu ma enweghị banyere mmetụta uche bụ ọdịnaya. The akara otu maka "positivity belata" otu E wuru a yiri ejiji. The nchọpụta ahụ chọpụtara na ndị nọ na positivity-belata ọnọdụ eji ubé ole na ole nti n'okwu na ubé ọzọ na-adịghị mma okwu, ikwu na akara ọnọdụ. N'otu aka ahụ, ha chọpụtara na ndị mmadụ na negativity-belata ọnọdụ eji ubé ka mma okwu na ubé ole na ole na-adịghị mma okwu. N'ihi ya, na-eme nnyocha hụrụ na-egosi mmetụta uche contagion (Kramer, Guillory, and Hancock 2014) ; n'ihi na a zuru ezu karị, ntụle nke imewe na ya pụta nke nnwale gụọ Isi nke 4.
Dị nnọọ ụbọchị mgbe a akwụkwọ e bipụtara na Proceedings of the National Academy of Sciences, e nwere nnukwu ihe Mkpu ákwá ma na-eme nnyocha na pịa. Iwe gburugburu akwụkwọ lekwasịrị anya isi ihe abụọ: 1) sonyere ka ọ bụla nkwenye n'ofè ọkọlọtọ Facebook okwu-nke-ọrụ na 2) ọmụmụ ama agbanweela-atọ ndị ọzọ usoro ziri ezi review (Grimmelmann 2015) . The usoro ziri ezi Ajụjụ ndị a jụrụ na a arụmụka mere ka magazin ngwa ngwa ebipụta a obere "isiokwu ngosipụta nke nchegbu" banyere ụkpụrụ omume na usoro ziri ezi nyochaa usoro maka nchọpụta (Verma 2014) . Ụdi afọ, ihe a anọgidewo na-abụ ihe na-enye ufiop arụmụka na esemokwu ahụ, na-akatọ ihe a nwere ike ịbụ na ndị na-atụghị mmetụta nke na-akwọ ụgbọala nke a ụdị nnyocha n'ime onyinyo (Meyer 2014) . Ya bụ, ụfọdụ nesi arumaru na ụlọ ọrụ adịghị akwụsị na-agba ọsọ ndị a iche iche nwere, ha nanị na-eji ha n'ihu ọha. Nke a arụmụka nwere ike na-eduga e kere eke nke na-usoro ziri ezi nyochaa usoro maka nchọpụta na Facebook (Hernandez and Seetharaman 2016; Jackman and Kanerva 2016) .