Evaluating WikiTrust: A trust support tool for Wikipedia

Lucassen, T. & Schraagen, J. M. (2011). Evaluating WikiTrust: A trust support tool for Wikipedia. First Monday, 16.

Because of the open character of Wikipedia readers should always be aware of the possibility of false information. WikiTrust aims at helping readers to judge the trustworthiness of articles by coloring the background of less trustworthy words in a shade of orange. In this study we look into the effects of such coloring on reading behavior and trust evaluation by means of an eye–tracking experiment. The results show that readers had more difficulties reading the articles with coloring than without coloring. Trust in heavily colored articles was lower. The main concern is that the participants in our experiment rated usefulness of WikiTrust low.

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Factual accuracy and trust in information: The role of expertise

Lucassen, T. & Schraagen, J. M. (2011). Factual accuracy and trust in information: The role of expertise. Journal of the American Society for Information Science and Technology, 62, 1232-1242.

In the past few decades, the task of judging the credibility of information has shifted from trained professionals (e.g., editors) to end users of information (e.g., casual Internet users). Lacking training in this task, it is highly relevant to research the behavior of these end users. In this article, we propose a new model of trust in information, in which trust judgments are dependent on three user characteristics: source experience, domain expertise, and information skills. Applying any of these three characteristics leads to different features of the information being used in trust judgments; namely source, semantic, and surface features (hence, the name 3S-model). An online experiment was performed to validate the 3S-model. In this experiment, Wikipedia articles of varying accuracy (semantic feature) were presented to Internet users. Trust judgments of domain experts on these articles were largely influenced by accuracy whereas trust judgments of novices remained mostly unchanged. Moreover, despite the influence of accuracy, the percentage of trusting participants, both experts and novices, was high in all conditions. Along with the rationales provided for such trust judgments, the outcome of the experiment largely supports the 3S-model, which can serve as a framework for future research on trust in information.

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Trust in Wikipedia: How Users Trust Information from an Unknown Source

Lucassen, T. & Schraagen, J. M. (2010). Trust in Wikipedia: How users trust information from an unknown source. In WICOW ’10: Proceedings of the 4th workshop on Information credibility, pages 19-26,New York,NY,USA. ACM.

The use of Wikipedia as an information source is becoming increasingly popular. Several studies have shown that its information quality is high. Normally, when considering information trust, the source of information is an important factor. However, because of the open-source nature of Wikipedia articles, their sources remain mostly unknown. This means that other features need to be used to assess the trustworthiness of the articles. We describe article features – such as images and references – which lay Wikipedia readers use to estimate trustworthiness. The quality and the topics of the articles are manipulated in an experiment to reproduce the varying quality on Wikipedia and the familiarity of the readers with the topics. We show that the three most important features are textual features, references and images.

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Ricochet Compositions

Kok, I.A. de, Lucassen, T., & Ruttkay, Zs. (2007). Ricochet Compositions. In Proceedings of the 10th BRIDGES Conference, pages 197-200. San Sebastian,Spain.

This short paper describes the basic principles of an implementation of an algorithmic art generator. It is based on the principle of ricocheting lines drawn on a two dimensional canvas. The user of the art generator is able to make some adjustments in terms of for instance coloring and the level of detail. An aim for the future is to reduce the human influence by insert knowledge about aesthetics into the system.

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Emotions of Musical Instruments

Lucassen, T. (2006). Emotions of Musical Instruments. In Proceedings of the 4th Twente Student Conference on IT, pages 279-286. Enschede, The Netherlands.

This paper describes a research regarding emotions of musical instruments. The goal is to find out whether it is possible to alter a communicated emotion to a listener by using various musical instruments. These instruments are the piano, marimba, alt sax and cello. After performing an experiment clear differences are visible, especially on the emotions joy and sadness.

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