Number of co-authors:12
Number of publications with 3 favourite co-authors:Manfred Tscheligi:5Peter Wolkerstorfer:2Özge Subasi:2
Michael Leitner's 3 most productive colleagues in number of publications:Manfred Tscheligi:105Alois Ferscha:16Reinhard Sefelin:15
Design can be art. Design can be aesthetics. Design is so simple, that's why it is so complicated.
-- Paul Rand, 1997
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Publications by Michael Leitner (bibliography)
Wimmer, Benjamin, Wöckl, Bernhard, Leitner, Michael and Tscheligi, Manfred (2010): Measuring the dynamics of user experience in short interaction sequences. In: Proceedings of the Sixth Nordic Conference on Human-Computer Interaction 2010. pp. 825-828.
In this paper we discuss the dynamics of user experience in short interaction sequences (SIS). By splitting up complex tasks into several smaller sub steps -- and therefore transforming it into a SIS -- it allows identifying and measuring dynamic changes of specific UX factors throughout the task. This enables generating a more detailed view than by common approaches like pre and post task evaluation. Through a study we examined the factors pleasantness and arousal on the basis of a generic online shopping process. For validation, two different methods (Emocards, Sensual Evaluation Instrument) were used for measurement. Results show different dynamics of UX for each of the evaluated sub steps and we therefore conclude that singular UX measurement (at one point of time) or pre and post task evaluation is not sufficient for getting a full picture of UX.
© All rights reserved Wimmer et al. and/or their publisher
Leitner, Michael, Wöckl, Bernhard, Subasi, Özge and Tschelgi, Manfred (2010): Towards the use of "negative effects" in technology design and evaluation. In: Proceedings of the HCI10 Conference on People and Computers XXIV 2010. pp. 443-447.
Negative effects of computer use are reported in different studies; but so far no standardized framework exists to work with these issues throughout a user-centred design process. "Negative effects" are the result of user, context and task characteristics and they diminish the performance, the perceived ease of use or even prevent people from using technology. In this paper we discuss different aspects and ideas in order to debate "negative effects" as origin of design and as evaluation criteria. The high-level goal of this approach is to avoid negative effects by design. This paper describes a number of basic thoughts and considerations to describe the idea of how and why "negative effects" should be considered throughout the design process.
© All rights reserved Leitner et al. and/or BCS
Schrammel, Johann, Leitner, Michael and Tscheligi, Manfred (2009): Semantically structured tag clouds: an empirical evaluation of clustered presentation approaches. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 2037-2040.
Tag clouds have become a frequently used interaction technique in the web. Recently several approaches to present tag clouds with the tags semantically clustered have been proposed. However, it remains unclear whether the expected gains in performance and advantages in interaction actually can be realized as no empirical evaluations of such approaches are available yet. In this paper we describe a series of experiments designed to evaluate the effects of semantic versus alphabetical and random arrangements of tags in tag clouds. The results of our work indicate that semantically clustered tag clouds can provide improvements over random layouts in specific search tasks and that they tend to increase the attention towards tags in small fonts compared to other layouts. Also, semantically structured tag clouds were preferred by about half of the users for general search tasks. Tag cloud layout does not seem to influence the ability to remember tags.
© All rights reserved Schrammel et al. and/or ACM Press
Leitner, Michael, Subasi, Özge, Höller, Norman, Geven, Arjan and Tscheligi, Manfred (2009): User requirement analysis for a railway ticketing portal with emphasis on semantic accessibility for older users. In: Proceedings of the 2009 International Cross-Disciplinary Conference on Web Accessibility W4A 2009. pp. 114-122.
In this paper, we present the results from a survey on user requirements for older users of online ticketing services of a nationwide railway ticket and travel information portal. Our survey shows that older users differentiate in their attitude towards internet according to their experience with internet services and the service provided, not only according to their age. Further, our study indicates that in contrary to common belief advertisement or interactive elements are not perceived as negative all the time. The results of a questionnaire with 1200 responses, focus groups, interviews and qualitative analysis of user feedback also indicate that in order to improve and optimize the usage of the online system for older adults, it is needed to supply the system not only with technical accessibility requirements but also with an understanding of universal accessibility requirements. Universal requirements are defined by real user and usage cases and they consider standardization on not only coding but also predictability of usage and same patterns of interaction for similar websites.
© All rights reserved Leitner et al. and/or ACM Press
Leitner, Michael, Wolkerstorfer, Peter, Sefelin, Reinhard and Tscheligi, Manfred (2008): Mobile multimedia: identifying user values using the means-end theory. In: Hofte, G. Henri ter, Mulder, Ingrid and Ruyter, Boris E. R. de (eds.) Proceedings of the 10th Conference on Human-Computer Interaction with Mobile Devices and Services - Mobile HCI 2008 September 2-5, 2008, Amsterdam, the Netherlands. pp. 167-175.
Leitner, Michael, Wolkerstorfer, Peter and Tscheligi, Manfred (2008): How online communities support human values. In: Proceedings of the Fifth Nordic Conference on Human-Computer Interaction 2008. pp. 503-506.
With our work we refer to value-sensitive and value-centered design approaches to answer the question "why" people join online communities. We conducted qualitative semi-structured Laddering interviews with 21 participants to identify relevant behavior motives for the use of online communities. We identified friendship, self-reflection and information purposes as the most relevant motives. Further, we demonstrate that in the users' experience online communities serve as information pools of social networks used for self-identification and self-reflection.
© All rights reserved Leitner et al. and/or their publisher
Ferscha, Alois, Holzmann, Clemens and Leitner, Michael (2006): Interfaces everywhere: interacting with the pervasive computer. In: Proceedings of the 2006 International Conference on Intelligent User Interfaces 2006. p. 21.
Due to recent technological advances, it has become possible to integrate sensor and actuator technologies as well as wireless communication in everyday objects and environments. These developments open up a huge amount of innovative interaction scenarios, involving new forms of user interfaces. This half day tutorial gives an overview of the emerging field of everywhere interfaces, referring to computing devices that disappear within objects of everyday life and thus enable omnipresent physical interfaces to the digital world, describes the state of the art of sensor and actuator technologies and demonstrates the development of a smart artefact for controlling everyday environments.
© All rights reserved Ferscha et al. and/or ACM Press
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