S. Baldassarri, J.A. Macías-Iglesias, J. Urquiza-Fuentes. Novatica, 226, Noviembre 2013
Special issue on "Interactive systems engineering: design and evaluation"
Mostrando entradas con la etiqueta Usability. Mostrar todas las entradas
Mostrando entradas con la etiqueta Usability. Mostrar todas las entradas
viernes, 1 de noviembre de 2013
martes, 2 de junio de 2009
A Survey of Successful Evaluations of Program Visualization and Algorithm Animation Systems
J. Urquiza-Fuentes, J.Á. Velázquez-Iturbide. Trans. Comput. Educ. 9(2), June 2009, Pages 1-21
Abstract. This article reviews successful educational experiences in using program and algorithm visualizations (PAVs). First, we survey a total of 18 PAV systems that were subject to 33 evaluations. We found that half of the systems have only been tested for usability, and those were shallow inspections. The rest were evaluated with respect to their educational effectiveness. Script-based systems seem to be well suited for the viewing, responding, and changing engagement levels, while compiler-based systems do well for the construction and presenting engagement levels. Finally, we analyze additional PAV features of successful evaluations and hypothesize that they are relevant.
Abstract. This article reviews successful educational experiences in using program and algorithm visualizations (PAVs). First, we survey a total of 18 PAV systems that were subject to 33 evaluations. We found that half of the systems have only been tested for usability, and those were shallow inspections. The rest were evaluated with respect to their educational effectiveness. Script-based systems seem to be well suited for the viewing, responding, and changing engagement levels, while compiler-based systems do well for the construction and presenting engagement levels. Finally, we analyze additional PAV features of successful evaluations and hypothesize that they are relevant.
miércoles, 18 de julio de 2007
Assessing the Usability of a Cookies-Based Access Monitoring Tool for a CMS
R. Hijón-Neira, J. Urquiza-Fuentes, F. Domínguez-Mateos, J.Á. Velázquez-Iturbide. In Seventh IEEE International Conference on Advanced Learning Technologies (ICALT) 2007, Pages 262-264
Abstract. We have developed several tools to allow instructors analyze students' interactions in a Course Management System. In this paper we describe a Systematic Usability Evaluation designed to test the usability of one of these tools. The evaluations were based on task analysis and follow-up studies. We have assessed effectiveness, efficiency, usefulness, ease of use, learnability, and user's satisfaction of the tool. In addition to regular observation and questionnaires, 3- scope video recording was used to provide the evaluator with more information about interactions. The use of this technology helped us in identifying functions and features that need improvement. We describe the three-step method that we have developed and the satisfactory results it has provided us.
Abstract. We have developed several tools to allow instructors analyze students' interactions in a Course Management System. In this paper we describe a Systematic Usability Evaluation designed to test the usability of one of these tools. The evaluations were based on task analysis and follow-up studies. We have assessed effectiveness, efficiency, usefulness, ease of use, learnability, and user's satisfaction of the tool. In addition to regular observation and questionnaires, 3- scope video recording was used to provide the evaluator with more information about interactions. The use of this technology helped us in identifying functions and features that need improvement. We describe the three-step method that we have developed and the satisfactory results it has provided us.
miércoles, 23 de mayo de 2007
Human-Centered Aspects
Olga Kulyk, Robert Kosara, Jaime Urquiza and Ingo Wassink. In Human-Centered Visualization Environments, 2007, Pages 13-75
Abstract. Humans have remarkable perceptual capabilities. These capabilities are heavily underestimated in current visualizations. Often, this is due to the lack of an in-depth user study to set the requirements for optimal visualizations. The designer does not understand what kind of information should be visualized, how it should be presented or what kind of interactions should be supported. The key elements of successful information visualization are the correct data using the best visualization technique and the best interaction techniques with respect to users. If one of these elements is ignored, people might interpret the data in the wrong way and thus might not understand the underlying information or a pattern.
Abstract. Humans have remarkable perceptual capabilities. These capabilities are heavily underestimated in current visualizations. Often, this is due to the lack of an in-depth user study to set the requirements for optimal visualizations. The designer does not understand what kind of information should be visualized, how it should be presented or what kind of interactions should be supported. The key elements of successful information visualization are the correct data using the best visualization technique and the best interaction techniques with respect to users. If one of these elements is ignored, people might interpret the data in the wrong way and thus might not understand the underlying information or a pattern.
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