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Auditing radicalization pathways on YouTube
Open accessAbstract
Non-profits, as well as the media, have hypothesized the existence of a radicalization pipeline on YouTube, claiming that users systematically progress towards more extreme content on the platform. Yet, there is to date no substantial quantitative evidence of this alleged pipeline. To close this gap, we conduct a large-scale audit of user radicalization on YouTube. We analyze 330,925 videos posted on 349 channels, which we broadly classified into four types: Media, the Alt-lite, the Intellectual Dark Web (I.D.W.), and the Alt-right. According to the aforementioned radicalization hypothesis, channels in the I.D.W. and the Alt-lite serve as gateways to fringe far-right ideology, here represented by Alt-right channels. Processing 72M+ comments, we show that the three channel types indeed increasingly share the same user base; that users consistently migrate from milder to more extreme content; and that a large percentage of users who consume Alt-right content now consumed Alt-lite and I.D.W. content in the past. We also probe YouTube's recommendation algorithm, looking at more than 2M video and channel recommendations between May/July 2019. We find that Alt-lite content is easily reachable from I.D.W. channels, while Alt-right videos are reachable only through channel recommendations. Overall, we paint a comprehensive picture of user radicalization on YouTube.
Overview
AI snapshot
Written from the paper’s full text.
TL;DR
This paper audits whether YouTube users radicalize across I.D.W., Alt-lite, and Alt-right channels, using 330,925 videos from 349 channels and 72M+ comments. It finds that the three communities increasingly share commenters, that users migrate from milder to more extreme content, and that Alt-right channels are reachable through YouTube’s channel recommendations even without personalization.
Key findings
- The commenting user bases of the I.D.W., Alt-lite, and Alt-right increasingly overlap: in 2018, the Jaccard similarity between Alt-lite and I.D.W. reached almost 30%, and the Overlap Coefficient of Alt-right with Alt-lite and I.D.W. reached around 50%, meaning about half of users who commented on Alt-right channels also commented in the other communities.
- Users systematically migrate toward more extreme content: among users who in 2006–2012 commented only on I.D.W. or Alt-lite content (227,945 users), by 2018 around 10% were lightly exposed to Alt-right content and roughly 4% were mildly or severely exposed, about 9K users total; among those who in 2017 commented only on Alt-lite or I.D.W. videos (1,251,674 users), approximately 12% were exposed, more than 60K users.
- In 2018, roughly 40% of Alt-right commenting users could be traced back to cohorts that had commented only on Alt-lite or I.D.W. videos in the past; media-channel users never surpassed 6% for any exposure level. For light exposure in 2018, 23.3% traced back to prior Alt-lite-only commenters versus 7.6% to prior I.D.W.-only commenters.
- Recommendation simulations show Alt-lite content is easily reachable from I.D.W. channels, while Alt-right videos are reachable only through channel recommendations: channel reachability@5 for Alt-right was about 4% from Alt-lite and 1.5% from I.D.W.; starting from I.D.W., there was about a 10% chance of being in an Alt-lite channel at the next step and 25% chance of having found at least one Alt-lite channel in 5 steps. Video recommendations made Alt-right much less reachable, with reachability@5 around 0.05% from Alt-lite.
Methods
- Large-scale audit of YouTube channels classified into Media, Alt-lite, I.D.W., and Alt-right. Data collection used seed channels, keywords, and iterative featured/related-channel expansion; two authors manually annotated channels over 3 weeks with interannotator agreement of 75.57% (95% CI [67.5, 82.5]), yielding 85 I.D.W., 112 Alt-lite, 84 Alt-right, and 68 media channels.
- Dataset: 349 channels, 330,925 videos, 72,069,878 comments, 5,980,709 commenting users, 2,474,044 video recommendations, and 14,283 channel recommendations. Data collection occurred 19–30 May 2019, with recommendations collected May–July 2019 using crawlers, 22 channel-recommendation rounds, 19 video-recommendation rounds, VPNs from 7 locations, random channel visit order, and no logged-in personalization.
- Analyses included Jaccard and Overlap Coefficient set similarities across commenting-user sets, cohort tracking of users who commented only on milder communities and later commented on Alt-right videos, and random-walk simulations on weighted recommendation graphs (10K runs, 5 steps) to measure probability and reachability.
Limitations
- The paper states that it cannot obtain the entire history of YouTube recommendations, so algorithmic analyses are limited to a time slice of a constantly changing black box; it also cannot fully tease apart the algorithm’s influence in earlier periods, and the recommendation analysis does not account for personalization.
- The paper states that it provides little insight into why radicalization pipelines exist, and that its focus is on basic statistics and user trajectories rather than tracing the evolution of speech or narratives over time.
- The paper states that its radicalization findings rely on the assumptions that commenting users are a good enough proxy for radicalization and that comments are supportive of the videos they accompany; it supports these assumptions with a manual check of 900 randomly selected comments, finding only 5 that could be interpreted as criticisms, and with higher like proportions for the communities of interest (>91% mean, >96% median) than for media channels (85% mean, 93% median). Evident from the text: channel labeling is fuzzy and conservative, and the video-recommendation simulation is less realistic because it ignores untracked videos.
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Claims the paper makes
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A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This effect is much stronger than for the large traditional and alternative media channels we collected (Sec. 6).”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“and that Alt-right channels may be reached from the two other communities (Sec. 7).”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“However, in 2018, there is a sharp growth in the similarity with media channels.”
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“as we can see that the communities of interest have many more highly active commenters.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Moreover, comments per view seem to be particularly high in more extreme content, reaching near to 1 comment for every 5 views in Alt-right channels in 2018 (Sec. 4).”
- Also stated in: § 4 THE RISE OF CONTRARIANS · p. 5 · plain
“Notably, Alt-right channels have, since 2017, become the ones with the highest number of comments per view, with nearly 1 comment per 5 views by 2018.”
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passes- Also stated in: § 4 THE RISE OF CONTRARIANS · p. 5 · plain
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“We find that Alt-lite content is easily reachable from I.D.W. channels”
- Also stated in: § 1 INTRODUCTION · p. 2 · plain
“Our analyses show that, particularly through the channel recommender system, Alt-lite channels are easily discovered from I.D.W. channels”
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A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Processing 72M+ comments, we show that the three channel types indeed increasingly share the same user base”
- Also stated in: § 1 INTRODUCTION · p. 2 · plain
“We inspect the intersection of commenting users across the communities, finding they increasingly share the same user base.”
- Also stated in: § 5 USER INTERSECTION · p. 6 · plain
“We again see that their users are more engaged, and, notably, find that the I.D.W, the Alt-lite, and the Alt-right increasingly share the same commenting user base.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passes- Also stated in: § 1 INTRODUCTION · p. 2 · plain
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“that users consistently migrate from milder to more extreme content”
- Also stated in: § 1 INTRODUCTION · p. 2 · plain
“We also find that the intersection is not only growing due to new users but that there is significant user migration among the communities being studied.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passes- Also stated in: § 1 INTRODUCTION · p. 2 · plain
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“These users are a significant fraction of the Alt-right commenting user base.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesA result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“while Alt-right videos are reachable only through channel recommendations.”
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- It may state two separate claims as one. 27
- The quote only partly states this claim. 2
- Probably not a substantial claim. 15
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“Most of the initial videos in the channel are about working out or video-games, with politics related videos becoming increasingly occurring.”
Tests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“However, for media channels, we find that the Jaccard similarity is plateauing since 2014 and that the overlap coefficient only recently started to grow”
Strength:plain· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
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In the paper
“while media and Alt-lite channels had published nearly 40% of their content, the Alt-right had published a bit more than 20%.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“Notably, in 2018, the Jaccard Similarity between the Alt-lite and the I.D.W. reached almost 30%, which is more than the self-similarity between the two communities.”
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Alt-lite and I.D.W. channels recommend channels from the same community around 50% of the time, and recommend each other around 14% (Alt-L to I.D.W.) and 23% (I.D.W. to Alt-L) of the time.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“We show that this migration phenomenon is not only consistent throughout the years, but also that it is significant in its absolute quantity.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: Commenting users are a good enough proxy for radicalization.
- The authors state this as an assumption: Comments in YouTube channels are supportive of the videos they are associated with.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Less than 1% of users in media channels were mildly or severely exposed, against 3% to 4% for Alt-lite or I.D.W. users, and roughly 4% were lightly exposed versus approximately 8% for Alt-lite or I.D.W users.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“So, while in 2018, 23 . 3% of users who were lightly exposed can be traced back to users who commented on Alt-lite channels in previous years, only 7 . 6% can be traced back to I.D.W. channels.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“More relevant, though, starting from media channels, the reachability@5 of I.D.W. and Alt-lite channels is of around 4 . 5% and 1 . 5% respectively.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“This number is much more expressive than the number of users which came from media channels - in the last row - which never surpasses 6% for any level of exposure.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“here we see that users who initially commented only on I.D.W. channels constitute a much less significant percentage of the Alt-right consumer base in upcoming years.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe quote only partly states this claim.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Less than 1% of users in media channels were mildly or severely exposed, against 3% to 4% for Alt-lite or I.D.W. users, and roughly 4% were lightly exposed versus approximately 8% for Alt-lite or I.D.W users.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“For channel recommendations, we have that the reachability@5 of Alt-right channels is of approximately 4% for the simulations starting from Alt-lite 1 . 5% for I.D.W. channels.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“For users who were tracked in 2006 -2012, around 15% were exposed in both scenarios, while for those tracked in 2017, this difference grew farther apart ( ∼ 12% Alt-lite vs. ∼ 6% I.D.W.).”
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In the paper
“For all levels of exposure, at all times, the number of exposed users that can be traced back to commenting exclusively on I.D.W. channels is around 3 times lower.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesThe quote only partly states this claim.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“When teasing apart users that commented only on Alt-lite or only on I.D.W. content, we find that, not only users who commented only on I.D.W. get less exposed, but increasingly less so.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
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In the paper
“Starting from the media channels, reachability@5 of I.D.W. channels is of 2 . 5%, and of slightly less than 1% for Alt-lite channels.”
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
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In the paper
“This phenomenon is significant both in terms of the percentage of the users tracked - as in Fig. 3 - and in terms of the total Alt-right commenting user base - as in Fig. 4.”
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In the paper
“Moreover, we note that the proportion of likes for the communities of interest is higher for the communities of interest ( > 91% mean, > 96% median) than for the media channels (85% mean, 93% median), which suggests the people interacting with the three communities agree with their videos.”
Strength:hedged· not yet calibratedCausal:correlational· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes? Load-bearing: unclear✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: Commenting users are a good enough proxy for radicalization.
- The authors state this as an assumption: Comments in YouTube channels are supportive of the videos they are associated with.
A result the paper reports from its own data — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“From these two communities, it is possible to find Alt-right content from recommended channels, but not from recommended videos.”
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In the paper
“To address this problem, in this paper we take a conservative approach to our labeling, naming only the most extreme content creators as Alt-right.”
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In the paper
“Each seed was independently annotated two times and discarded in case there was any disagreement.”
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In the paper
“The annotation process lasted for 3 weeks. In case they disagreed, they had to discuss the cases individually until a conclusion was reached.”
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In the paper
“Although comments may give us insight into the past, it is challenging to tease apart the influence of the algorithm in previous times.”
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In the paper
“Notice that we do not have the user's entire activity history, and thus, we track their activity only in the channels whose videos we collected.”
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In the paper
“and thus it is hard to tell whether their users are less engaged.”
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In the paper
“Moreover, channels were always visited in random order, to prevent any biases from arising from session-based recommendations.”
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In the paper
“To circumvent possible location bias in the data we collected we used VPNs from 7 different locations: 3 in the USA, 2 in Canada, 1 in Switzerland and 1 in Brazil.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesProbably not a substantial claim.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“In the video recommender system, Alt-right channels are less recommended, but finding Alt-lite channels from the I.D.W. and I.D.W. channels from the large media channels in the media group is also feasible.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“This process may also be amplified when taking personalization into account.”
Strength:hedged· not yet calibratedCausal:conditional· not yet calibratedTests✓ Asserted: passes✗ Checkable: fails✗ Load-bearing: fails✗ Based: failsProbably not a substantial claim. It may be too vague to check against evidence. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“Overall, we find that, in the channel recommender system, it is easy to navigate from the I.D.W. to the Alt-lite (and vice-versa), and it is possible to find Alt-right channels.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
In the paper
“We argue that this finding provides significant evidence that there has been, and there continues to be, user radicalization on YouTube, and our analyses of the activity of these communities (Sec. 4) is consistent with the theory that more extreme content 'piggybacked' on the surge in popularity of I.D.W. and Alt-lite content [30].”
What the sources say
- Not checked yetcites [30] [30] Angela Nagle. 2017. Kill All Normies: Online Culture Wars From 4Chan And Tumblr To Trump And The Alt-Right . -
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
- The authors state this as an assumption: Commenting users are a good enough proxy for radicalization.
- The authors state this as an assumption: Comments in YouTube channels are supportive of the videos they are associated with.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“However, it does not give insight into how expressive the effect is in terms of what part of the Alt-right user base has gone through it.”
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In the paper
“Unfortunately, we have only a snapshot of the recommender system which does not take into account personalization. Thus, it is hard to reach significant conclusions on what was the role of the recommender system in the radicalization process we depicted in Sec. 6.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
None of the sources cited for this claim have been checked yet.
In the paper
“The previous study suggests that the pipeline effect does exist, and that indeed, users systematically go from milder communities to the Alt-right.”
Tests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✗ Based: failsProbably not a substantial claim. The paper may give no reason why it holds. It may state two separate claims as one.
The paper states this without a source or data behind it here, so there is nothing to check it against. The quote shows it is in the paper.
In the paper
“This is, to our best knowledge, the first large scale quantitative audit of user radicalization on YouTube.”
Strength:hedged· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✗ Based: failsProbably not a substantial claim. The paper’s conclusions may not depend on it. The paper may give no reason why it holds.
- Rests on an assumption: There is to date no substantial quantitative evidence of the alleged radicalization pipeline on YouTube.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Since the channel is small, removing it has no noticeable impact on the results presented in this paper.”
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
- Rests on an assumption: The removed channel 'theglassblindspot' is small.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Although we argue this is strong evidence for the existence of radicalization pathways on YouTube, our work provides little insight on why these radicalization pipelines exist.”
Strength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✗ Load-bearing: fails✓ Based: passesProbably not a substantial claim. The paper’s conclusions may not depend on it.
- The authors state this as an assumption: Commenting users are a good enough proxy for radicalization.
- The authors state this as an assumption: Comments in YouTube channels are supportive of the videos they are associated with.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Notice that the scenario for the channels is more realistic, and we give more weight to the conclusions drawn there.”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✗ Based: failsProbably not a substantial claim. The paper may give no reason why it holds. It may state two separate claims as one.
What the paper did — it cites no source for this, so there is none to check. The quote shows it is in the paper.
In the paper
“Noticeably, our analysis has several shortcomings which do not allow us to make bold claims about this research question. Firstly, we are able to look only at a tiny fraction of actual recommendations - it could very well be that Alt-right content was being more widely promoted in the past. Secondly, our analysis does not take into account personalization, which could reveal a completely different”
Load-bearingStrength:plain· not yet calibratedTests✓ Asserted: passes✓ Checkable: passes✓ Load-bearing: passes✓ Based: passesIt may state two separate claims as one.
The paper relies on this without support.
There is to date no substantial quantitative evidence of the alleged radicalization pipeline on YouTube.
“Yet, there is to date no substantial quantitative evidence of this alleged pipeline.”
The authors state this as an assumption.
Commenting users are a good enough proxy for radicalization.
“Noticeably, the findings related to this research question make the implicit assumption that commenting users are a good enough proxy for radicalization, and that comments in YouTube channels are supportive of the videos they are associated with.”
The authors state this as an assumption.
Comments in YouTube channels are supportive of the videos they are associated with.
“Noticeably, the findings related to this research question make the implicit assumption that commenting users are a good enough proxy for radicalization, and that comments in YouTube channels are supportive of the videos they are associated with.”
The paper relies on this without support.
The removed channel 'theglassblindspot' is small.
“Since the channel is small”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“Such path dependencies may have transformative effects, changing the preferences and values of the users themselves and leading to radicalization”
From Stewardship of global collective behavior (2021) · cites this paper as [128]
In the citing paper
“Despite the opacity, research has revealed how algorithms lead users to radical or age-inappropriate content (128, 164), exacerbate disparities in health (123), and increase bias in policing (124).”
From Stewardship of global collective behavior (2021) · cites this paper as [128]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Alt-right channel-recommendation row exceeds 100%
MinorThe five channel-recommendation percentages in the Alt-R row of Table 3 sum to 116.83%, although they describe the distribution of outgoing recommendations among destinations. The corresponding video-recommendation percentages sum to 100%.
Reported 100 · recomputed 116.83
“| Alt-R | 25.73/ 1.89 | 42.94/ 1.15 | 25.73/ 8.55 | 1.35/ 3.38 | 21.08/ 85.03 |”
Alt-lite-to-Alt-right recommendation percentage differs from Table 3
MinorThe text gives 3.08% for Alt-lite channel recommendations to Alt-right channels, while Table 3 gives 3.38% for that source and destination.
“Alt-right channels are only recommended by Alt-lite channels (3 . 08%).”
“| Alt-L | 13.69/ 2.46 | 55.15/ 12.70 | 3.38/ 0.13 | 2.82/ 3.24 | 24.96/ 81.47 |”
Video-recommendation reachability contradicts the claim that it is impossible
MinorThe abstract says Alt-right videos are reachable only through channel recommendations, but Section 7 reports nonzero Alt-right reachability through video recommendations from Alt-lite.
“Alt-right videos are reachable only through channel recommendations.”
“For video recommendations, reaching Alt-right channels from other communities is less likely. From the Alt-lite, reachability@5 is of around 0 . 05%.”
Reverse Alt-right-to-Alt-lite percentage is incorrect
MinorIn Table 6, 2,962 infected users out of 5,691 tracked users is approximately 52.05%, not 525%.
Reported 525 · recomputed 52.047092
“| | | 2017 | 2962 | 5691 | 0.64% | 525% |”
Citations
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“Previous large scale algorithmic auditing include measuring discrimination on AirBnB [14], personalization onweb search [19] and price discrimination on e-commerce web sites [20].”
BackgroundMeasuring personalization of web search
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Flagged first, then by citations
1 of the 23 references couldn’t be matched to a known paper.
Research works printed but not linked: 4
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Perliger, A., & Mills, J. (2022) · Palgrave hate studies · doi:10.1007/978-3-030-99804-2_15
Populist Performance and the Aesthetics of YouTube
Glazunova, S. (2022) · Springer eBooks · doi:10.1007/978-3-030-93503-0_7
Når algoritmer styrer nyhedsstrømmen. YouTube-anbefalinger under folketingsvalget i 2019
van Dalen, A. (2021) · Politica · doi:10.7146/politica.v53i2.130385
Metadata
- Authors
- Ribeiro, M. H., Ottoni, R., West, R., Almeida, V. A. F., & Meira, W.
- Affiliations
- École Polytechnique Fédérale de Lausanne (CH)
- Universidade Federal de Minas Gerais (BR)
- UFMG
- Venue
- Proceedings of the 2020 Conference on Fairness, Accountability, and Transparency
- Publisher
- ACM
- Published
- 2020-01-27
- Pages
- 131-141
- OpenAlex
- W2969399596
- Semantic Scholar
- 57911e835999c5b0fc8aea382bd7569a180503ae
- Cited by
- 580
- References
- 23
- Citations by year
- 2026: 110 · 2025: 70 · 2024: 89 · 2023: 105 · 2022: 78 · 2021: 69 · 2020: 52
- FWCI
- 161.71
- Type
- conference paper
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- ACM Conference on Fairness, Accountability, and Transparency (FAccT) (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
- arXiv (Cornell University)
- Funders
- Atmosphere
- Capes
- INCT-Cyber
- Google Research Award
- Fapemig
- CNPq
- MASWEB
- Topics
- Social Sciences › Sociology and Political Science › Misinformation and Its Impacts
- Social Sciences › Political Science and International Relations › Populism, Right-Wing Movements
- Social Sciences › Communication › Social Media and Politics
- Keywords
- radicalization, YouTube, far-right ideology, alt-right, user engagement
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
A language model drew the claims from the paper on 2026-10-09, under version 3 of the claim definition (model deepseek-v4.1-flash, prompt extract-v3).
A second model labelled each claim on 2026-10-09 (model jev-1.13-20260917, definition revision gold-guideline-v0.2).
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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