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Most of the challenges are fun and harmless. However, there are also users who launch challenges that are dangerous, or at least suitable only for an adult audience (and TikTok is the most popular social network for teenagers). This article focuses primarily on this kind of challenge. In particular, it investigates an aspect not yet studied in the literature, which is the different characteristics and evolutionary dynamics of the communities of users participating in non-dangerous and dangerous challenges. Its final goal is the identification of evolutionary patterns that distinguish the communities of users participating in the two types of challenges. The knowledge of these patterns could be a first step in implementing an approach to the early detection of dangerous challenges in TikTok.<\/jats:p>","DOI":"10.1177\/01655515221116519","type":"journal-article","created":{"date-parts":[[2022,8,12]],"date-time":"2022-08-12T04:57:27Z","timestamp":1660280247000},"page":"1170-1194","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":16,"title":["Investigating community evolutions in TikTok dangerous and non-dangerous challenges"],"prefix":"10.1177","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1947-8667","authenticated-orcid":false,"given":"Gianluca","family":"Bonifazi","sequence":"first","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8494-7829","authenticated-orcid":false,"given":"Silvia","family":"Cecchini","sequence":"additional","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1140-4209","authenticated-orcid":false,"given":"Enrico","family":"Corradini","sequence":"additional","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lorenzo","family":"Giuliani","sequence":"additional","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1360-8499","authenticated-orcid":false,"given":"Domenico","family":"Ursino","sequence":"additional","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luca","family":"Virgili","sequence":"additional","affiliation":[{"name":"Department of Information Engineering (DII), Polytechnic University of Marche, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2022,8,12]]},"reference":[{"key":"bibr1-01655515221116519","doi-asserted-by":"publisher","DOI":"10.1177\/1367549420945341"},{"key":"bibr2-01655515221116519","doi-asserted-by":"publisher","DOI":"10.4337\/9781788978286.00015"},{"key":"bibr3-01655515221116519","first-page":"22","volume-title":"Proceedings of the international conference on human-computer interaction (HCI\u201921)","author":"Chen Z"},{"key":"bibr4-01655515221116519","first-page":"183","volume-title":"Proceedings of the 2020 IEEE 3rd international conference on information systems and computer aided education (ICISCAE\u201920)","author":"Wei B"},{"key":"bibr5-01655515221116519","doi-asserted-by":"publisher","DOI":"10.1177\/0008125620958166"},{"key":"bibr6-01655515221116519","doi-asserted-by":"publisher","DOI":"10.1177\/0165551516644171"},{"key":"bibr7-01655515221116519","first-page":"257","volume-title":"Proceedings of the international web science conference (WebSci\u201920)","author":"Medina Serrano JC"},{"issue":"3","key":"bibr8-01655515221116519","first-page":"53","volume":"1","author":"Lujain A","year":"2020","journal-title":"KIU Interdiscip J Human Soc Sci"},{"key":"bibr9-01655515221116519","doi-asserted-by":"publisher","DOI":"10.47611\/jsrhs.v10i2.1777"},{"key":"bibr10-01655515221116519","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph17010192"},{"key":"bibr11-01655515221116519","doi-asserted-by":"publisher","DOI":"10.1093\/her\/cyab010"},{"key":"bibr12-01655515221116519","doi-asserted-by":"publisher","DOI":"10.2196\/21463"},{"key":"bibr13-01655515221116519","doi-asserted-by":"publisher","DOI":"10.1177\/0165551515625029"},{"key":"bibr14-01655515221116519","unstructured":"Davis M. \u2018This is for you\u2019: an anthropological approach to relationships to TikTok and its algorithm. 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