Open Access

Annalena Aicher, Klaus Weber, Elisabeth André, Wolfgang Minker, Stefan Ultes

• Humans form opinions and justify different points of view by exchanging arguments and knowledge. Likewise to human-human interaction, the way arguments are presented influence the user's willingness to engage into a critical reflection. Especially when interacting with conversational agents the user's engagement and motivation are important factors and highly influence the success or failure of such a mixed team. To maintain the users' trust and satisfaction, the users' perception of the respective system is an important indicator. Thus, this work investigates the design of a cooperative argumentative dialogue system using a virtual avatar compared to a non-avatar interface by evaluating a crowdsourcing study conducted with 84 participants. The results indicate, that the avatar system is perceived as significantly more appealing and natural and thus, engaging which also influences the acceptance and perception of the quality of presented arguments. Furthermore, we found that theHumans form opinions and justify different points of view by exchanging arguments and knowledge. Likewise to human-human interaction, the way arguments are presented influence the user's willingness to engage into a critical reflection. Especially when interacting with conversational agents the user's engagement and motivation are important factors and highly influence the success or failure of such a mixed team. To maintain the users' trust and satisfaction, the users' perception of the respective system is an important indicator. Thus, this work investigates the design of a cooperative argumentative dialogue system using a virtual avatar compared to a non-avatar interface by evaluating a crowdsourcing study conducted with 84 participants. The results indicate, that the avatar system is perceived as significantly more appealing and natural and thus, engaging which also influences the acceptance and perception of the quality of presented arguments. Furthermore, we found that the presence of the avatar often led to an increase in the anticipated level of conversational proficiency similar to that of a human interlocutor. Therefore, this work provides important insights for the design of future cooperative argumentative virtual avatar interfaces.…