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text/1_intro.tex
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%grammarly checks %grammarly checks
StackExchange is a Q\&A platform and consists of 174 communities\footnote{\url{https://stackexchange.com/tour}}. Each community evolves around a specific topic, for instance, StackOverflow focusing on software engeneering, or AskUbuntu focusing on the Ubuntu operating system. This distincts StackExchange from other Q\&A sites such as \emph{Yahoo! Answers} where no such differentiation into topics exists. %TODO ref StackExchange is a Q\&A platform and consists of 174 communities\footnote{\url{https://stackexchange.com/tour}}. Each community evolves around a specific topic, for instance, StackOverflow focusing on software engeneering,
or AskUbuntu focusing on the Ubuntu operating system. This distincts StackExchange from other Q\&A sites such as \emph{Yahoo! Answers} where no such differentiation into topics exists. %TODO ref
% stackexchange and how it developed via stackoverflow \cite{mamykina2011design} good description of SO % stackexchange and how it developed via stackoverflow \cite{mamykina2011design} good description of SO
% Design Lessons from the Fastest Q&A Site in the West \cite{mamykina2011design} early investigation of so % Design Lessons from the Fastest Q&A Site in the West \cite{mamykina2011design} early investigation of so
@@ -13,12 +14,14 @@ StackExchange is a Q\&A platform and consists of 174 communities\footnote{\url{h
% write new numbers about so %TODO % write new numbers about so %TODO
In August of 2018, the StackExchange team introduced a small change that may have had a huge impact on the platform. They added a new feature to visibly mark questions from new contributors, as part of their effort to make the site more welcoming for new users\footnote{\url{https://meta.stackexchange.com/questions/314287/come-take-a-look-at-our-new-contributor-indicator}}. Specifically, members who want to answer a question created by a new contributor are shown a notification in the answer box that this question is from a new contributor. The StackExchange team hopes that this little change encourages members to be more friendly and forgiving toward new users. In August of 2018, the StackExchange team introduced a small change that may have had a huge impact on the platform. They added a new feature to visibly mark questions from new contributors, as part of their effort to make the site more welcoming for new users\footnote{\url{https://meta.stackexchange.com/questions/314287/come-take-a-look-at-our-new-contributor-indicator}}.
Specifically, members who want to answer a question created by a new contributor are shown a notification in the answer box that this question is from a new contributor. The StackExchange team hopes that this little change encourages members to be more friendly and forgiving toward new users.
% write about the change investigated % write about the change investigated
% stackexchange new contriutor post: https://meta.stackexchange.com/questions/314287/come-take-a-look-at-our-new-contributor-indicator?cb=1 % stackexchange new contriutor post: https://meta.stackexchange.com/questions/314287/come-take-a-look-at-our-new-contributor-indicator?cb=1
% what did change intend? % what did change intend?
This thesis evaluates whether this change has a real impact on the community and if so how the community reacts. For this analysis, this thesis utilizes Vader \cite{hutto2014vader}, a sentiment analysis tool, to measure the sentiments of the answers submitted to questions of new contributors. Furthermore, this thesis includes the votes these questions receive and the number of questions new contributors ask. Interrupted time series are then applied to these values to evaluate whether the change achieved its purpose of making the platform more welcoming. This thesis evaluates whether this change has a real impact on the community and if so how the community reacts. For this analysis, this thesis utilizes Vader \cite{hutto2014vader}, a sentiment analysis tool, to measure the sentiments of the answers submitted to questions of new contributors. Furthermore, this thesis includes the votes these questions receive
and the number of questions new contributors ask. Interrupted time series are then applied to these values to evaluate whether the change achieved its purpose of making the platform more welcoming.
% how is change investigated by this thesis % how is change investigated by this thesis
% vader library % vader library
@@ -30,7 +33,8 @@ This thesis investigates the ten largest communities of the StackExchange platfo
%write a bit about results %write a bit about results
%write about next chapters %write about next chapters
The remaining part of this thesis is structured as follows: Section 2 explains StackExchange and its communities, how it works, and shows related work. Section 3 shows the method this thesis uses for analysis in detail. Section 4 contains the investigated datasets. Results are presented in Section 5 and discussed in Section 6. Section 7 concludes this thesis. The remaining part of this thesis is structured as follows: Section 2 explains StackExchange and its communities, how it works, and shows related work. Section 3 shows the method this thesis uses for analysis in detail.
Section 4 contains the investigated datasets. Results are presented in Section 5 and discussed in Section 6. Section 7 concludes this thesis.

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text/4_datasets.tex
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\end{figure} \end{figure}
``Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields.''\footnote{\url{https://math.stackexchange.com/}}
The community has 624671 registered users of which 17074 were active between December 2019 and February 2020.
Members asked 1170938 questions in total and gave 1565188 answers with an average answer density of 1.336 answers per question.
New users asked 265704 questions with an average of 1.336 questions per new user during their first week after first contribution.
\hspace*{-5cm}
\begin{sidewaystable}
\begin{tabularx}{\textheight}{l|rrrrrrr}
Site & Register & Active & Questions & Answers & Answer & Questions by & Questions per\\
& users & users & & & density & new users & new user\\\hline
StackOverflow.com & 11867244 & 297192 & 18699974 & 27981749 & 1.496 & 2880039 & 1.240\\
math.stackexchange.com & 624671 & 17074 & 1170938 & 1565188 & 1.336 & 265704 & 1.336\\
MathOverflow.net & 105471 & 1501 & 108083 & 144918 & 1.34 & 23746 & 1.131\\
AskUbuntu.com & 783614 & 7033 & 334194 & 418051 & 1.25 & 157018 & 1.101\\
ServerFault.com & 451180 & 3947 & 274564 & 432334 & 1.574 & 88547 & 1.106\\
SuperUser.comment & 861533 & 7392 & 424718 & 587559 & 1.383 & 161397 & 1.085\\
electronics.stackexchange.com & 184795 & 3172 & 130025 & 221811 & 1.705 & 47035 & 1.126\\
stats.stackexchange.com & 227032 & 4485 & 151777 & 148046 & 0.975 & 57636 & 1.112\\
tex.stackexchange.com & 171867 & 3280 & 188860 & 227875 & 1.206 & 59692 & 1.191\\
unix.stackexchange.com & 356498 & 4565 & 174625 & 256007 & 1.466 & 62437 & 1.124\\
\end{tabularx}
\vspace*{5cm}
\end{sidewaystable}
% general information % general information
% dataset from to dates % dataset from to dates

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text/5_results.tex
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The 4 previously mentioned communities do not profit from the change. Although some communities improve in one statistic, they do not improve accross the field as shown in the other 6 communities. The 1st question statistic decreases in all 4 communities. With the exception of math.stackexchange.com, all of these communities do not improve in the followup question statistic. In all communities the vote score is on a (worse) downward trend after the change. Also, the sentiment values are decreasing after the change. The 4 previously mentioned communities do not profit from the change. Although some communities improve in one statistic, they do not improve accross the field as shown in the other 6 communities. The 1st question statistic decreases in all 4 communities. With the exception of math.stackexchange.com, all of these communities do not improve in the followup question statistic. In all communities the vote score is on a (worse) downward trend after the change. Also, the sentiment values are decreasing after the change.
When looking at the results of SuperUser, the community stands out and shows interesting results. After about 6 mouths after the change the community the number of 1st questions triple. This level of new questions continues for 7 months before the the number go down towards the previous levels. In the same time frame the vote score and sentiment take a significant dive. After that the sentiment returns almost to the previous level while the vote score only increases mildly. However, this sudden increase in 1st questions and therefore users is not related to the change this thesis investivates. When looking at the results of SuperUser, the community stands out and shows interesting results. After about 6 mouths after the change the community the number of 1st questions triple. This level of new questions continues for 7 months before the the number go down towards the previous levels. In the same time frame the vote score and sentiment take a significant dive. After that the sentiment returns almost to the previous level while the vote score only increases mildly. However, this sudden increase in 1st questions and therefore users is not related to the change this thesis investigates.
%summary not working %summary not working
% number of 1st questions does not increase after the change % number of 1st questions does not increase after the change
@@ -260,4 +260,6 @@ When looking at the results of SuperUser, the community stands out and shows int
% sentiment scores started decreasing more rapid % sentiment scores started decreasing more rapid
% superuser oddball % superuser oddball
Summarizing, the change introduced by StackExchange clearly improved the engagement in 6 of the 10 investigated communities. Sentiment, vote score, and number (1st and follow-up questions) rose as a result. The other 4 communities do not profit from the change. Although, many statistics jump up to a higher level the downward trends are not stopped. The statistics of SuperUser show a large influx of new users about 6 months after the change sending the sentiment and vote score on a deep dive and with the decrease in new users they raise again. However, this event is not related to the change but the magnitude of the huge change in new user numbers renders the analysis uncomparable. Summarizing, the change introduced by StackExchange clearly improved the engagement in 6 of the 10 investigated communities. Sentiment, vote score, and number (1st and follow-up questions) rose as a result. The other 4 communities do not profit from the change. Although, many statistics jump up to a higher level the downward trends are not stopped. The statistics of SuperUser show a large influx of new users about 6 months after the change sending the sentiment and vote score on a deep dive and with the decrease in new users they raise again. However, this event is not related to the change but the magnitude of the huge change in new user numbers renders the analysis uncomparable.

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text/main.tex
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%% ... it's OK to put here your own usepackage commands ... %% ... it's OK to put here your own usepackage commands ...
\usepackage[figuresright]{rotating}
\usepackage{tabularx}
%\usepackage{natbib} %\usepackage{natbib}
\usepackage[ \usepackage[
backend=biber, backend=biber,

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todo3.txt
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datasets datasets
abschließend, große table mit stats die eh schon drin sind DONE > abschließend, große table mit stats die eh schon drin sind