Auflistung nach Schlagwort "evaluation"
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- ZeitschriftenartikelCogniPGA: Longitudinal Evaluation of Picture Gesture Authentication with Cognition-Based Intervention(i-com: Vol. 18, No. 3, 2019) Katsini, Christina; Avouris, Nikolaos; Fidas, ChristosThere is evidence that the visual behavior of users when creating graphical passwords affects the password strength. Adopting a cognitive style perspective in the interpretation of the results of recent studies revealed that users, depending on their cognitive style, follow different visual exploration paths when creating graphical passwords which affected the password strength. To take advantage of the inherent abilities of people, we proposed CogniPGA, a cued-recall graphical authentication scheme where a cognition-based intervention using gaze data is applied. This paper presents the longitudinal evaluation of the proposed scheme in terms of security, memorability, and usability from a cognitive style perspective. Results strengthen the assumptions that understanding and using the inherent cognitive characteristics of users could enable the design of user-first authentication schemes, where no compromises need to be made on security for benefiting usability or the other way around.
- KonferenzbeitragCross-Browser Tests und die Tücken des Alltags(UP14 - Kurzvorträge, 2014) Charlier, Nicole; Süß, DanielDie Diversität der Endgeräte erhöht sich jeden Tag. Ein Usability Professional steht hier vor den Fragen: 'Wie teste ich meine Anwendungen und wann bin ich damit fertig?' Aufwandsprojekte und Festpreisprojekte unterscheiden sich zudem stark im zeitlichen Umfang der Evaluation, sollen aber gleichwertig im Endergebnis sein. Welche Werkzeuge brauche ich als Usability Professional um effizient im Projektablauf die Qualität meiner Anwendungen zu gewährleisten? Praxiserfahrungen aus Festpreisprojekten sollen Usability Professionals helfen, die richtigen Fragen zu stellen und sich das eigene (physische oder virtuelle) 'Testlabor' zusammenzustellen.
- ZeitschriftenartikelA design and evaluation framework for digital health interventions(it - Information Technology: Vol. 61, No. 5-6, 2019) Kowatsch, Tobias; Otto, Lena; Harperink, Samira; Cotti, Amanda; Schlieter, HannesDigital health interventions (DHIs) have the potential to help the growing number of chronic disease patients better manage their everyday lives. However, guidelines for the systematic development of DHIs are still scarce. The current work has, therefore, the objective to propose a framework for the design and evaluation of DHIs (DEDHI). The DEDHI framework is meant to support both researchers and practitioners alike from early conceptual DHI models to large-scale implementations of DHIs in the healthcare market.
- KonferenzbeitragEDA Scale - Assessing Awareness for Energy Dynamics(Mensch und Computer 2019 - Tagungsband, 2019) Gödker, Markus; Dresel, Markus; Franke, ThomasEnergy-related behavior in resource dependent systems (e.g. electric vehicles, houses, ships) is an important factor for the actual energy efficiency such systems can achieve. Energy feedback human-machine-interfaces (HMIs) can support the awareness of energy dynamics in order to comprehend the situation and the influences on energy consumption and to control the system to enhance energy efficiency. To evaluate these HMIs a scale to assess the energy dynamics awareness (EDA) is needed. Therefore we developed the EDA scale with 7 items and tested the scale in a study with N = 40 battery electric bus (BEB) drivers on two different HMIs. First results indicated an excellent reliability (Cronbach’s α = .92 and .93) and principal factor analyses revealed a solid single factor structure (61.8% and 67.8% explained variance) with high factor loadings (> .61 for all items). Future studies should further explore the construct and criterion validity of the scale.
- KonferenzbeitragEvaluating a User-Elicited Gesture Set for Interactive Displays(Mensch & Computer 2011: überMEDIEN|ÜBERmorgen, 2011) Heydekorn, Jens; Frisch, Mathias; Dachselt, RaimundRecently, many studies were conducted which focused on eliciting gestures from users in order to come up with gesture sets for surface computing. However, there are still many questions to clarify concerning the value of this method regarding to the usability of such gesture sets in real systems. In this work, we contribute a usability test of an implemented gesture set based on user suggested pen and hand gestures for node-link diagram editing on interactive displays. The results of the usability test gave valuable insight in how users interact spontaneously with such a gestural interface. In particular, we found that the methodology of eliciting gestures from users reveals what kinds of gestures users prefer but does not necessarily show how they are applied. Beyond that, we observed how participants differentiate between touch and pen within complex workflows.
- WorkshopbeitragEvaluating the engagement of users from public interactive displays(Mensch und Computer 2023 - Workshopband, 2023) Mathes, Lukas Klaus Peter; Cabalo, Coleen Celeste; Gatzemeyer, LarsAn adaptive public display needs a good understanding of its environment. This means which objects are in the sphere of influence, how they behave and how they interact with them. Especially when dealing with users of an interactive public display, it is therefore important to have a metric about the engagement of passers-by. In this work, we incorporate the current state of research on topics related to engagement and mindfulness of passers-by of a public wall display. We use 3D depth camera data, which recognizes a model of passers-by. Based on different scientific approaches, we then build a model of the different parameters of attention to analyze the collected data. Through further experiments, we validate the validity of the model with respect to different test cases.
- KonferenzbeitragEvaluation Methods and Replicability of Software Architecture Research Objects(Software Engineering 2023, 2023) Konersmann, Marco; Kaplan, Angelika; Kühn, Thomas; Heinrich, Robert; Koziolek, Anne; Reussner, Ralf; Jürjens, Jan; al-Doori, Mahmood; Boltz, Nicolas; Ehl, Marco; Fuchß, Dominik; Großer, Katharina; Hahner, Sebastian; Keim, Jan; Lohr, Matthias; Sağlam, Timur; Schulz, Sophie; Töberg, Jan-PhilippOur paper at the 19th IEEE International Conference on Software Architecture (ICSA 2022) started by noticing that Software Architecture (SA) as research area experienced an increase in empirical research. Empirical research builds a sound foundation for validity and comparability. A current overview of the evaluation and replicability of SA research objects could help to discuss our empirical standards as a community. However, no current overview existed. We assessed the current state of practice of evaluating SA research objects and replication artifact provision in full technical conference papers from ICSA and the European Conference on Software Architecture (ECSA) 2017–2021. We first developed a categorization schema for SA research object evaluation and artifact provisioning. In a systematic literature review with 153 papers, we then classified the papers according to that schema. From our findings we derive and describe four proposals for improving the state of practice in evaluating SA research objects.
- WorkshopbeitragEvaluation of a gamification approach for increasing interaction with public displays(Mensch und Computer 2023 - Workshopband, 2023) Buhl, Wolfgang; Buller, Viktor; Engel, Klaas-FrederikIn this paper we present the results of an experiment to increase the attraction of a public display. To do so, we added a gamification component to improve the frequency of interaction and did an in-the-wild evaluation of the changes by analyzing the automatically logged data in combination with conducting a survey of the staff. We compare interaction data gathered before and during the experiment, and highlight the differences in these two data sets and explain their significance in prospect to the experiment. First, we discuss whether we achieved our goal of increasing the attraction or not based on the interaction data. Second we evaluate the results of our survey in which we asked people that work near the public display and possibly interacted with it, to gather some more information. The combination of both information sources allows us to further answer a question regarding intrinsic and extrinsic motivational factors to interact with smart screens.
- ZeitschriftenartikelEvaluation of Mixed Reality Support for Bridge Inspectors Using BIM Data - Digital Prototype for a Manual Task with a Long-Lasting Tradition(i-com: Vol. 21, No. 2, 2022) Riedlinger, Urs; Klein, Florian; Hill, Marcos; Lambracht, Christian; Nieborowski, Sonja; Holst, Ralph; Bahlau, Sascha; Oppermann, LeifBridge inspectors work for the safety of our infrastructure and mobility. In regular intervals, they conduct structural inspections – a manual task with a long-lasting and firmly normed analogue tradition. In our collaborative research project, we developed Mixed Reality (MR) and Virtual Reality (VR) prototypes to support that work digitally. We propose a mixed analogue and digital workflow using Building Information Modeling (BIM) data that can be ready-to-hand for bridge inspectors during their work on-site at a bridge. In this paper, we describe the system and the evaluation results of our final MR demonstrator at a autobahn-bridge in Germany. We identified a need for a digital MR tool to support the bridge inspection in-situ. In general, this matches with the trend to bring the computer-supported office-work out into the real world. However, there are also challenges to consider, like lacking BIM data for existing bridges and structures, appropriate user-interfaces in this new application domain, or the need to adopt norms and guidelines for public tender. We argue to consider a user-centered design approach for future developments to best profit from the bridge inspectors’, as well as the MR- and CSCW-researchers expertise, and ultimately increase the acceptance of the developed information systems.
- WorkshopbeitragExploring Interactive Information Radiators – A Longitudinal Real-World Case Study(Mensch und Computer 2019 - Workshopband, 2019) Ott, Florian; Koch, MichaelWe present a longitudinal case study of implementing inter-active information radiators in practice. The insights from the case study include the importance of including users in finding relevant information, and of presenting this information in an attractive way. The semi-public space poses special challenges for design and clearly shows the need for doing research through (longitudinal) deployment-based studies. On the other side, the study also shows some problems of doing longitudinal case studies of semi-public installations – particularly field access and availability of quantitative data.