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    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Divergent Discourses: A Comparative Examination of Blackout Tuesday and #BlackLivesMatter on Instagram</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Knierim</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Aenne</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Michael Achmann</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Ulrich Heid</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Christian Wolf</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Universität Hildesheim</institution>
          ,
          <addr-line>Universitätsplatz 1, 31134 Hildesheim</addr-line>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>Universität Regensburg</institution>
          ,
          <addr-line>Universitätsstraße 31, 93035 Regensburg</addr-line>
        </aff>
      </contrib-group>
      <abstract>
        <p>On May 25th, 2020, a viral eleven-minute clip showing the murder of George Floyd sparked international outrage and solidarity, leading to the digital memorial event Blackout Tuesday on Instagram. We analyzed posts to compare Blackout Tuesday discourse with #blacklivesmatter movement conversations. Using topic modeling, we identified dominant themes and counter-narratives in Blackout Tuesday and #blacklivesmatter captions. Using hashtag co-occurrence analysis, we investigate hashtag networks to situate the discourses within spheres of Instagram activism. Our findings indicate that both corpora share themes like ”calls to action”, but Blackout Tuesday posts are shorter and solidarity-focused, while #blacklivesmatter posts are longer and address white privilege more explicitly. #blacklivesmatter is linked to anti-racist activism hashtags, while Blackout Tuesday connects more with popular culture and #Alllivesmatter. This supports qualitative research on Blackout Tuesday's performative allyship, adding a quantitative perspective to existing research.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;Blackout Tuesday</kwd>
        <kwd>#blacklivesmatter</kwd>
        <kwd>Instagram</kwd>
        <kwd>Cultural Analytics</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <p>The number of posts from the #blacklivesmatter
movement (#blm) is estimated to be 28 million, which
exempliifes the movement’s impact on society [ 1, 2]. However,
the popularity of the movement reached a peak when
“Blackout Tuesday” (BT) took place, a digital memorial
day on Instagram [1, 2]. BT was caused by a wave of
outrage about the murder of George Floyd, an African
American who was killed on May 25, 2020 by two white
police oficers in Minneapolis. The outrage was sparked
by an 11-minute clip of the murder which went viral in
social media. The video was posted in the context of the
#blm movement and in a cultural setting where African
Americans perceived law enforcement as agents of
brutality [3]. To postulate solidarity with African Americans
in their fight for racial justice, social media users posted
a black square and added a post caption with the
hashtag #blackouttuesday. Given the cultural context, the
video supported the perception of white police brutality, 2. BT and #blm on Instagram
white supremacy, and systemic injustice against African
Americans. While #blm needed years to gain a large #blm is a movement started by the three African
Amerinternational audience, BT reached millions within a day. ican women Alicia Garza, Patrisse Cullors, and Opal</p>
      <p>The #blm movement has received significant attention Tomet. It is described as: ”an ideological and political
inin research and has had a strong impact on discussions tervention in a world where Black lives are systematically
in mainstream media; however, little attention has been and intentionally targeted for demise. It is an afirmation
of Black folks’ contributions to this society, our
humanity, and our resilience in the face of deadly oppression”
[4]. The number of posts from the #blm movement is
estimated to be 28 million, which exemplifies the
movement’s impact on society [1, 2]. #blm is a new-new social
movement: hierarchical, participatory and decentralized,
paid to BT to date. Most existing research on BT has
been conducted using interview studies and hermeneutic
methodologies. In addition, there is one quantitative
study by Chang et al. [7] which examines the contents
of images, focusing on visual and geographic analyses.</p>
      <p>Because a large share of the posts related to BT feature
a black tile rather than an image, it is also important to
examine the text in the post, the caption.</p>
      <p>To fill this gap, this study used text mining to
investigate the content of posts on BT. We examined the
interrelations between BT and #blm by applying topic modeling
and hashtag co-occurrence analysis to both discourses
within the same period of time. Our aim was to
understand how BT has impacted the #blm discourse. We also
wanted to compare the diferent types of discourse, as BT
is a digital memorial day, whereas #blm is a new social
movement.
repertoires, combining connective with collective action 4. Digital memorial day versus new social
[5, 6]. In the summer of 2020, 20 million people joined movement: BT and #BlackLivesMatter
constiprotests to address racial injustice and demand account- tute diferent forms of political participation in
ability for the murder of countless Black people at the social media. Is this visible in the posts, topical
hands of law enforcement [7, 8]. clusters and networks of hashtags? If so, can we</p>
      <p>BT was part of the campaign #TheShowMustBePaused, draw conclusions about how discussions are led
spreading from the music industry to social media [9, 10]. diferently depending on the type of participation,
It was started by Jamila Thomas and Brianna Agyemang, in this case a memorial day versus a new social
both female music executives at major record companies movement?
in the U.S. [10]. The campaign was opened in response to
the murders of George Floyd, Breonna Taylor, Ahmaud
Arbery and other Black citizens at the hands of police 3. Data Collection and Description
[11]. Thomas and Agyemang encouraged music industry
professionals to halt business operations for the duration Building on the framework of Cultural Analytics, we base
of June 2, 2020 to prompt conversation about financial em- our analysis on cultural sampling [16]. Because hashtags
powerment of Blacks in the music industry [10, 11]. The structure online discourse [12], we used the hashtags
campaign involved posting a black square on Instagram, #blackouttuesday and #blm to create our cultural sample.
while refraining other social media activity that day [10]. Manovich highlights that current humanities research
Soon, the hashtag morphed and circulated, with posts follows ”Close Reading” [17] as the dominant paradigm
being diferent than intended [ 9, 10]: the hashtag was of textual analysis which puts single artifacts by
profesused to postulate solidarity with George Floyd, instead of sional authors at the center of research [16, 18]. Using
encouraging financial empowerment of Blacks in the mu- cultural samples allows to investigate nonprofessional
sic industry. This also impacted the #blm conversation vernacular created by ”regular” people [16]. We add a
on Instagram. distant reading perspective to existing research on racial</p>
      <p>Often, users posted the hashtag #blm in #blackouttues- justice movements by extracting a cultural sample of
day posts. Hashtags allow users to find specific infor- #blm and BT from Instagram posts.
mation or to monitor a situation because they serve to We collected our corpus retrospectively using
Crowdstructure discourse centered around a specific topic in Tangle1. We used the two search terms
#blacklivesmatsocial media platforms like Instagram [12, 13]. In table 2, ter and #blackouttuesday to find public Instagram posts
we show that nearly 10% of #blackouttuesday posts were published within a three month period following the
tagged with the hashtag #blm. Using #blm in BT posts death of George Floyd. Our corpus comprises posts from
concealed #blm posts with social justice information, hin- 05/24/2020 11:59 pm to 08/24/2020 12:00 am. We
exdering critical collective organization [10, 13]. Therefore, ported the data in two batches, as CrowdTangle’s search
#blm called not to use the hashtag along with BT posts. limits exports to a maximum of 300,000 posts. Using
Next to concealing #blm posts, BT critics called it “white this method, we collected 548,249 posts for #blm, and
guilt day” [14]. Posts were considered as empty gestures 305,344 posts for #blackouttuesday. The CrowdTangle
[15, 10]. This accusation was not made in the context of dataframes contain posts as a link to one image per post
#blm. and the ”description” column that contains the caption</p>
      <p>With a bird’s eye view on hashtag relations and topics, of the post. In addition, the exported data includes
metawe hope to gain insight into diferences between BT posts data for each post: The timestamp when the post was
and #blm. Thus, we investigated the following research published, the username and name of the creator, and
questions: interaction metrics for likes and comments. Our analysis
concentrates on captions, the textual part of Instagram
1. Topic prevalence and significance: What are posts. Additionally, we use the timestamps for a
descripthe dominant themes and topics in the #black- tive analysis of trends within our corpus.
outtuesday and #blm Instagram captions? Com- We collected the top hashtags and sorted them by
usparing the two, what are the core concerns? age in Table 2. Expectedly, #blm posts referenced BT, with
2. Counter speech: Which counter narratives ap- #georgefloyd, #blackouttuesday and #icantbreathe in the
pear? top twenty hashtags. Unlike #blackouttuesday, #blm
con3. Hashtag co-occurences Which hashtags co- tains no references to the original campaign
#theshowoccurring in the #blackouttuesday and #blm feeds mustbepaused in the top hashtags. #blackouttuesday also
are most prevalent, and do their interconnections includes #alllivesmatter, a hashtag signaling
counterdisform distinct clusters? What do these hashtag course. Breonna Taylor, another victim of police brutality,
networks suggest about the broader contexts and is referenced in the #blm corpus.
intersections within the sphere of black activism?</p>
    </sec>
    <sec id="sec-2">
      <title>4. Hashtag Co-Occurences</title>
      <p>The type-token density is a measure for language
complexity. It allows insight into the complexity of both
discourses, which we present in Table 1. Expectedly, Omena introduces hashtags as natively digital objects
type-token density is high in both discourses when mea- that enable users to join debates on the local and global
sured including hashtags. We attribute this to special scale through their indexing function [19]. Following
characteristics of social media language, such as frequent Roger’s digital methods approach [20], we use these
hashuse of hashtags, non-standardized spelling and the use of tags as digital traces [21] to study the #blm movement in
emojis. While BT has a higher type-token density than the light of BT. Co-occurrence analysis allows to extract
#blm when hashtags are included (0,96 vs 0,88), we can a network of hashtags, which gives insight into the
movesee that #blm has a higher type-token density when hash- ments’ relations to other activist discourses indexed by
tags are excluded (0.79 vs 0.56 without hashtags). This hashtags.
shows that more diferent hashtags are used in #black- For the co-occurence analysis, we preprocessed both
outtuesday posts than in #blm posts. At the same time, corpora in the same way. We extracted the hashtags from
the text without hashtags is less lexically diverse than each caption using regex, lowercased the hashtags and
in #blm posts. The type-token density in #blackouttues- counted the occurences of each hashtag. We selected
day is only slighty above average (0.56), while #blm has the top 1,000 hashtags for each corpus and created a
a type-token ratio that is quite high (0.79). #blm posts co-occurrence network, counting the co-occurence for
are also longer than #blackouttuesday posts. On aver- each hashtag pair. Each network was imported to Gephi,
age, #blm post lengthis three times longer than that of where we used the modularity algorithm [22] to find
#blackouttuesday posts (69 tokens incl. hashtags to 19 hashtag clusters [23]. In a last step, we plotted the
nettokens). This ratio remains consistent when substracting work for each modularity class within each of the two
hashtags (60 vs 16 tokens). networks. These plots were the basis for our
qualitative exploration of the hashtag clusters. Through this
exploration, we were able to name each cluster based
on the hashtags they contain. We extracted the
modu6. Results
6.1. Core concerns and narratives
larity classes associated with each hashtag to conduct
a quantitative assessment of the hashtag clusters. We
excluded the search hashtag from each network during
this mapping process to mitigate potential biases
(#blackouttuesday for the one, #blm for the other). Each post
was then assigned to a specific class based on a majority
rule approach which considered the hashtags present in
the post. We labeled cases as ’ambigious’ where a clear
majority for a particular modularity class was not evident.</p>
      <p>The hashtag clusters are saved in a digital repository.2
We visualize the most frequent themes occuring in the
datasets in figure 1 and figure 2, with the bubble size
representing the relative frequency within the 100 most
frequent topics. The colors for shared topics in both
discourses correspond. The datasets share many common
themes. We identify that both datasets contain many
”calls to action”. Apparently, many posts aim to activate
readers politically, for example by joining protests or
5. Topic Modeling signing petitions. Other calls to action are more generic,
manifesting in topic words like fight or change. Other
Topic modeling is a method to cluster themes in large posts ask readers to become conscious of racism and
corpora that is widely applied in the digital humanities. white privilege. In the #blm dataset, 30% of posts are
Typical for social media data, our posts are quite short, ”calls to action”, while only 13 % of the BT posts fall into
with post length ranging from ¯= 19 token for BT posts this category.
to ¯ = 69 token for #blm posts. Therefore, we chose to We identified the theme ”voice-of-color” in the
topemploy BERTopic [24] for the topic modeling due to its ics. The voice-of-color is an established thesis from
critability to handle sparse data. ical race theory. It holds that alleged minority status</p>
      <p>We applied only minimal preprocessing. We removed brings with it a presumed competence to speak about
@mentions for privacy protection and deleted 29 post race and racism [28]. The speech act of ”breaking the
duplications that are a result of the scraping process. silence” appears in both corpora. It is more present in the
Next to this, we removed words with two or less letters, #blm dataset (for a comparison, see figure 1 and figure 2).
stopwords and the hashtags. Within the BT dataset, this becomes visible with topics</p>
      <p>After preprocessing and topic modeling, we assigned that include words such as voice, heard, voices, use, space.
labels to the 100 most frequent topics of each dataset Within the #blm dataset, this becomes even more clear,
(postprocessing). For a human eye, it becomes clear that with topics such as Silent, silence, quiet, staying, silenced,
many topics follow broader themes. Therefore, we add an Voice, voices, heard, amplify, use.
additional step by identifying broader themes consisting Both corpora share themes, but we identify two big
of similar topics after the postprocessing. diferences. Common themes are mentions of other
anti</p>
      <p>Firstly, we apply the baseline application of BERTopic racist movements, references to African American artists
[24], using UMAP for dimensionality reduction and the and musicians, or references to platform afordances. A
HBDSCAN minimal cluster size to 30 [25, 26]. This re- diference lies in internationality. 21% of BT topics are
duced the amount of topics drastically, which is why we written in other languages than English, such as Spanish,
set the minimal cluster size to 150 items. Although the German, French or Russian which points to the
internabaseline application of BERTopic [24] yields good results tional character of BT (considering the 100 most frequent
in terms of readibility and topic diversity, we conducted topics). In contrast, #blm is rooted in the English
speakan experimental study for finetuning on samples of both ing countries U.S., Canada, and Australia [29]. Another
datasets to increase topic diversity (n=0,1%). Maximal diference between the corpora is the perspective of
soliMarginal Relevance considers the similarity of tokens darity which is prevalent in BT posts. 7% of topics relate
with the document, along with the similarity of already to solidarity, using hashtags like #icare or
#togetherforselected keywords and keyphrase [27, 24]. We found that change. In contrast, the #blm dataset thematizes equality
topic words consisted of two words instead of one in and privilege, calling out white privilege (3% of topics).
many cases, but would sometimes contain the same word While solidarity expresses the perspective of an outsider,
twice. The application of MMR did not increase topic the corresponding #blm theme expresses a deeper
underdiversity. We found that the right preprocessing is more standing of racism and systems of oppression.
important to obtain high topic diversity.
2https://osf.io/cu2bj/?view_only=bc770f9539c64682a0bd477d5bd6bb99</p>
      <sec id="sec-2-1">
        <title>6.2. Connection with other spheres of</title>
      </sec>
      <sec id="sec-2-2">
        <title>Black activism</title>
        <p>The modularity algorithm discovered five communities
within the hashtag co-occurences for #blm, and six for
BT. In case of BT, hashtags were split unevenly between
the classes: Classes 2–4 contained between 3.6% (=33, related to of-topic hashtags. For example, two
hashclass 3) and 5.8% (=53, class 4) of all hashtags, while tag networks contain mundane content related to the
the classes 0, 1, and 5 contained between 16.6% (=152, food blogging and wildlife, such as #animalsofinsta,
#aniclass 0) and 35.4% (=325, class 1) of all hashtags. The mallover or #wildlifeonearth. Another network revolves
smallest cluster contains hashtags referring to food and purely around U.S. sports men and basketball. Unlike
animals. Class 4 contains references to sport and class the comparable co-occurence network at #blm, these
net5 the #blackgirlmagic and #blackbusiness theme. The works do not contain any other hashtags from
Africanclasses 0, 1, and 5 contain political hashtags, multilin- American communities except for #blm and
#blackexcelgual hashtags, and content-related hashtags (like #por- lence within the animal topics. This shows the
maintrait). The hashtag #blackouttuesday appears in class 0, stream character of BT compared to #blm. This is
supthe multi-lingual class, possibly as the unique bridge to ported by the wide political spectrum visible in
solidarthe other clusters. When mapping posts to modularity ity hashtags, referencing conservative and republican
classes based on the top 1000 hashtags, 71.6% (=56783) hashtags alongside hashtags on the political left such as
of all posts were identified to belong to class 1, the clus- #socialist or contents related to the democratic party.
ter that contains most hashtags related to the movement, A shared topic are support networks for black
busilike #theshowmustbepaused and #justiceforgeorgefloyd. nesses and empowerment content of black women,
re10.6% of posts (=8371) were mapped to the multilin- lated to hashtags such as #BlackGirlMagic,
#BlackEmgual cluster (0), 8.21% (=6507) to cluster 5, and 6.28% powerment or #melaninpoppin. Scholars have
estab(=4975) of posts were classified as ambiguous, as they lished that empowerment occurs within the realm of
did not show a clear majority for the one or the other social media. For example, #BlackGirlMagic, introduced
cluster. A minority of posts was mapped to classes 2–4. by CaShawn Thompson, negotiates societal presentations</p>
        <p>The hastags co-occuring in the #blm network are more of Black women [30]. Black women-centered discourse
evenly split into four clusters: from 37.3% (=373) in class achieves empowerment by highlighting their experiences
3 to 13.7% (=137) in class 2. Hashtags contained in the in ways that are often neglected or distorted in traditional
largest cluster (3) are mostly non-political and mundane media outlets [31]. Within the #blm corpus, these
hash(#family, #food, #college, #followme). The smallest class tags are closely connected to mental health content. In
(2) contains #black+x hashtags, like #blackqueen, #black- the BT context, hashtags are connected to support
hashnews, #blackbloggers. Class 0 (24.4%, =244) contains tags for Black businesses.
hashtags revolving around justice in combination with
diferent topics, as well as allyship hashtags (e.g. #istand- 6.3. Counter Speech
withyou), while class 1 (24.6%, =24.6) clusters hashtags
related to politics and policy issues (e.g #notmypresident, Another hashtag shared by both #blm and BT is the
#guncontrol). The classification based on the hashtag colorblind hashtag #alllivesmatter. #Alllivesmatter is a
mapping for posts shows a more even distribution for the counter-protest hashtag whose content argues that equal
#blm hashtag which is congruent with the hashtag distri- attention should be given to all lives regardless of race
bution across clusters. Most posts were mapped to cluster [32]. The ”All Lives Matter” movement is, ”one of the
pri1 (31.1%, =127410), with the ambiguous classification mary ways in which people resisted the #blm movement
coming second (19.2%,  =78706). 17.5% ( =71907) [...] in the form of [...] a counterslogan to undermine
posts were mapped to the mundane class 3, and 17.3% the purpose and message of the #blm call to action” [33].
( =70947) to class 0. Finally, the smallest amount of Powell et al. have shown that the use of #blm or
#Allposts (15.0%,  =61308) were classified to cluster 2. LivesMatter are signals of political identity [34].</p>
        <p>In general, the #blm co-occurence network shows that
the social movement is closely related to other hashtags 6.4. Political Hashtags
of Black activism, while also containing links to popular
culture that are common to Instagram, such as art or Several political hashtags appear close to #blm, like
photography. In the aftermath of George Floyd’s death, #berniesanders, #NeverTrump, #NeverBiden and
#Prothe hashtags #justiceforgeorgefloyd, #protest, #policebru- gressives. A number of city hashtags are close to these
tality, #justiceforbreonnataylor and the German hashtag hashtags, namely #LosAngeles, #Hollywood, #Brooklyn,
#gegenrassismus (”against racism”), are closest to dif- #Atlanta, and #Chicago. A study analyzing Twitter
proferent spellings of #blm. An example of the hashtag’s ifle information found that the #blm movement is largely
relatedness to other movements of Black activism are ignored in places with a large percentage of white or
empowerment hashtags, such as #blackexellencexx, #un- Hispanic populations, compared to places with smaller
apologeticallyBlack and #BlackGirlMagic. percentages of these groups [35]. Published in 2019, the</p>
        <p>While BT co-occurence networks contain hashtags study was conducted before BT which gave the #blm
from a wider political spectrum than #blm, they are also movement a new spark both in the U.S. and
internationally. A geospatial analysis could provide insight into
whether this finding remains true after BT and if it is
true for both #blm and BT posts.
intersectional discrimination of African Americans and
carry unconscious biases that are potentially harmful.
7. Discussion: Digital memorial
day versus new social
movement
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