\chapter*{Abstract}
\label{cha:abstract}

StackExchange is a question and answer platform and as many other social platforms, StackExchange is eager to provide a good first impression to users. StackExchange made many decisions to attract new users. One of these decisions was to introduce the \emph{new contributor} indicator which is shown to users that may answer a question from a new user. This thesis investigates whether this change improved the experience of new users. To measure whether the change achieved its intended target, this thesis uses VADER to quantify the sentiment of the answers to questions of new contributors which are then used in an interrupted time series analysis. The results indicate that in some of the communities the change did indeed achieve its intended purpose.


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