In this study, the effects of visualization tools on argumentation skills, knowledge acquisition, and motivation during learning with a hypermedia learning environment were examined. Participants in this experiment had to complete an argumentation task on environmental issues by using a hypermedia learning environment as resource. In one condition, participants were provided with a graphical mi...

Although the preferential model semantics is the standard semantics for non-monotonic reasoning systems, it is not used for argumentation frameworks. For argumentation frameworks, instead, argumentation semantics are used. This paper studies the relation between the two types of semantics. Several argumentation semantics are related to additional constraints on the preference relation over stat...

Argumentation semantics in extended logic programming has been defined in [5,12] for a single agent which determines its believes by an internal argumentation process. In this paper we extend the initial argumentation framework to a multi-agent setting including both argumentation and cooperation. We define inference for multi-agent systems and define an algorithm for inference. We sketch an ar...

This work provides initial results on the relationship between argumentation and Paul Thagard’s coherence theory. We study the relationship, via appropriate transformations, between different types of coherent graphs (according to the values in the arcs) and different argumentation frameworks such as Dung’s abstract argumentation framework, weighted argument systems or preference-based argument...

Argumentation is a key research area within CSCL. Yet, while many empirical studies investigating the educational benefits of various forms of collaborative argumentation have been conducted, there has not been much work done towards developing generic and reusable software architectures for collaborative argumentation that have the potential to reduce the development time for argumentation lea...

This chapter gives an overview of the history of formal argumentation in terms of a distinction between argumentation-based inference and argumentation-based dialogue. Systems for argumentationbased inference are about which conclusions can be drawn from a given body of possibly incomplete, inconsistent of uncertain information. They ultimately define a nonmonotonic notion of logical consequenc...

Argumentation has gained popularity in recent years as a knowledge representation formalism to support, in particular, non-monotonic and paraconsistent reasoning. I will trace back the origins of two well-known argumentation frameworks (namely abstact argumentation and assumption-based argumentation) to work on the semantics of logic programming and abductive logic programming in the late eight...

Work on argumentation-based dialogue systems often assumes that the adoption of argumentation leads to improved efficiency and effectiveness. Several studies have taken an experimental approach to prove these alleged benefits, but none has so far supported the expressiveness of a logic for structured argumentation. This paper shows how the use of argumentation in deliberation dialogues can be t...