This paper presents a two-wave survey experiment on self-image concerns in voting. We elicit votes on a ballot initiative in Switzerland that spurred campaigns involving widely shared normative values. We investigate how messages that change the self-signaling value of a Yes vote affect...

This paper applies argument mining techniques to political discussions obtained from an online chat experiment prior to a ballot. We investigate the task of automatically detecting chat messages that give justification for an underlying claim. We use bag-of-words features as well as state of the...