Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/23720
DC FieldValueLanguage
dc.contributor.advisorSirivianos, Michael-
dc.contributor.authorPapadamou, Kostantinos-
dc.date.accessioned2021-12-28T09:47:13Z-
dc.date.available2021-12-28T09:47:13Z-
dc.date.issued2021-04-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/23720-
dc.description.abstractYouTube has revolutionized the way people discover and consume video content. Although YouTube facilitates easy access to hundreds of well-produced educational, entertaining, and trustworthy news videos, abhorrent, misinformative and mistargeted content is also common. The platform is plagued by various types of inappropriate content including: 1) disturbing videos targeting young children; 2) hateful and misogynistic content; and 3) pseudoscientific and conspiratorial content. While YouTube’s recommendation algorithm plays a vital role in increasing user engagement and YouTube’s monetization, its role in unwittingly promoting problematic content is not entirely understood. In this thesis, we shed some light on the degree of abhorrent, misinformative, and mistargeted content on YouTube and the role of the recommendation algorithm in the discovery and dissemination of such content. Following a data-driven quantitative approach, we analyze thousands of videos posted on YouTube. Specifically, we devise various methodologies to detect problematic content, and we use them to simulate the behavior of users casually browsing YouTube to shed light on: 1) the risks of YouTube media consumption by young children; 2) the role of YouTube’s recommendation algorithm in the dissemination of hateful and misogynistic content, by focusing on the Involuntary Celibates (Incels) community; and 3) user exposure to pseudoscientific misinformation on various parts of the platform and how this exposure changes based on the user’s watch history. In a nutshell, our analysis reveals that young children are likely to encounter disturbing content when they randomly browse the platform starting from benign videos relevant to their interests and that YouTube’s currently deployed counter-measures are ineffective in terms of detecting them in a timely manner. By analyzing the Incel community on YouTube, we find that not only Incel activity is increasing over time, but platforms may also play an active role in steering users towards extreme content. Finally, when studying pseudoscientific misinformation, we find among other things that YouTube suggests more pseudoscientific content regarding traditional pseudoscientific topics (e.g., flat earth) than for emerging ones (like COVID-19), and that these recommendations are more common on the search results page than on a user’s homepage or the video recommendations (up-next) section.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.publisheraen_US
dc.rightsΑπαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectYouTube’s recommendation algorithmen_US
dc.subjectRedditen_US
dc.subjectdisturbing contenten_US
dc.subjectinvoluntary celibatesen_US
dc.subjectmisinformationen_US
dc.subjectpseudoscienceen_US
dc.titleCharacterizing Abhorrent, Misinformative, and Mistargeted Content on YouTubeen_US
dc.typePhD Thesisen_US
dc.affiliationCyprus University of Technologyen_US
dc.description.membersGeorge Pallis, Andreas Andreouen_US
dc.relation.deptDepartment of Electrical Engineering, Computer Engineering and Informaticsen_US
dc.description.statusCompleteden_US
cut.common.academicyear2020-2021en_US
dc.relation.facultyFaculty of Engineering and Technologyen_US
item.grantfulltextopen-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_db06-
item.openairetypedoctoralThesis-
item.fulltextWith Fulltext-
crisitem.author.deptDepartment of Electrical Engineering, Computer Engineering and Informatics-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0002-6500-581X-
crisitem.author.parentorgFaculty of Engineering and Technology-
Appears in Collections:Διδακτορικές Διατριβές/ PhD Theses
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