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  • 1. Aronsson, Henrik
    et al.
    Nilsson, Jenny
    Från Oz-prototyp till programmerad prototyp: fallstudie "Räkna med matte"2003Report (Refereed)
    Abstract [sv]

    Vi har gjort en fallstudie av Wizard of Oz-testers bidrag till implementerings-processen. I denna fallstudie har vi skapat Wizard of Oz- och high fidelity-prototyper för att utveckla ett datorprogram till barn. Båda prototyperna testades på användare med användbarhetstester i Ozlab vid Karlstads universitet respektive i användarmiljö och utvecklades i ett iterativt arbete. Wizard of Oz-prototyperna bestod av skärmbilder där interaktiviteten skapades av testledaren vid varje testtillfälle. High fidelity-prototypen programmerades för att fungera som den tänkta produkten. Studien visar att kontinuerliga användbarhetstester är nödvändiga för att få ett användbart slutresultat. Studien visar också att Wizard of Oz-prototyperna passar bra in i början av programutvecklingsprocessen även om high fidelity-prototyping är inplanerat i ett senare utvecklingsskede.

  • 2.
    Fischer Hübner, Simone
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Nilsson, Jenny
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Trust and Assurance Control: UI prototypes2009Report (Other academic)
    Abstract [en]

    This deliverable presents User Interface (UI) prototypes for a Trust Evaluation Function, which has the purpose of communicating reliable information about trustworthiness and assurance (that the stated privacy functionality is provided) of services sides to end users. For the design of this trust evaluation function, we have followed an interdisciplinary approach by investigating social factors for establishing reliable trust, technical and organizational means, as well as HCI (Human Computer Interaction) concepts for mediating evaluation results to the end users. Three iterations of mockups of trust evaluation function UIs that were produced and tested at Karlstad Universitys Ozlab are presented and discussed

  • 3. Nilsson, Jenny
    Det användarcentrerade projektet2004Report (Other academic)
  • 4. Nilsson, Jenny
    Interaktionsdesign av pedagogisk programvara: En experimentell studie av demonstrationer som hjälpfunktioner i ett övningsprogram för mellanstadiebarn2005Report (Refereed)
    Abstract [sv]

    Detta arbete behandlar demonstrationer som hjälpfunktioner i pedagogisk programvara genom att ställa en dimension för demonstrationsinnehåll mot en dimension för medieval. Ett program som syftar till att fungera som stöd för barn då de lär in divisionsalgoritmen kort division har valts för denna undersökning eftersom divisionsalgoritmen passar för enkla demonstrationer. Tre prototyper skapades och testades i skolmiljö med hjälp av Karlstads universitets Ozlabsystem.



    En grupp barn fick räkna med en prototyp innehållande endast generella animerade demonstrationer, typexempel, av hur tal ska räknas ut (grupp G). En annan grupp barn fick se specifika animerade demonstrationer som visade hur det tal de för tillfället räknade ska lösas, ett slags animerat facit (grupp S). Resultatet visade att de barn som endast fick generell hjälp upplevdes vara i större behov av uppmuntran från de närvarande vuxna än de barn som såg de specifika demonstrationerna. Även en skillnad i användning mellan de båda grupperna kunde skönjas då barnen i grupp G valde att, i en betydligt högre utsträckning än de i grupp S, se demonstrationen innan de började räkna på en ny nivå. Intervjusvaren visade även att grupp S var mer positiva till hjälpen, men grupp G tyckte det var lättare att räkna med programmet.



    Demonstrationerna gjordes sedan som generella videoklipp (lärare vid vita tavlan) vilka jämfördes med generella animeringar för att undersöka vilket alternativ barnen föredrog att använda och vilket de angav att de tyckte bäst om. Resultatet från både observationer av barnens användning av programmet samt deras svar i den efterföljande intervjun visar att animationerna uppskattades mest av barnen. Den främst påtalade anledningen till varför animationen var lättare att förstå var för att då visades samma bild som testpersonerna såg. Animationer som medium har dock en fördel gentemot videoklipp då de enklare kan anpassas till varierande situationer och möjliggör demonstrationer av ett stort antal tal, vilket är en situation som förinspelade klipp inte är lämpade för.

  • 5. Nilsson, Jenny
    et al.
    Siponen, Joe
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Challenging the HCI Concept of Fidelity by Positioning Ozlab Prototypes2006Conference paper (Refereed)
    Abstract [en]

    This paper challenges the validity of the fidelity concept as used by the HCI community to describe different types of prototypes. This is done by attempting to position the Wizard of Oz methodology in this dichotomy. The Ozlab system, created at Karlstads University, extends the Wizard of Oz methodologys modalities to the graphical user interface (GUI). It is possible to categorise an Ozlab prototype as being of low- or high-fidelity depending on if it is the users or the developer's view of fidelity that is used. This in turn is caused by the fact that Wizard of Oz prototypes are perceived as real by the user even though the perception was made pos-sible by a human facilitator that manually provides the responses of the prototype. The dissociation between the perceived and implemented auto-matic behaviour is shown to be another, more adequate, way of comparing prototypes if the goals of prototyping is kept in mind, namely to explore user requirements

  • 6.
    Pettersson, John Sören
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Fischer Hübner, Simone
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Danielsson, Ninni
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Nilsson, Jenny
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Bergmann, Mike
    TU Dresden, Germany.
    Clauss, Sebastian
    TU Dresden, Germany.
    Kriegelstein, Thomas
    TU Dresden, Germany.
    Krasemann, Henry
    Independent Centre for Privacy Protection (ICPP), Germany.
    Making PRIME Usable2005In: Proceedings of the 2005 symposium on Usable privacy and security, Association for Computing Machinery (ACM), 2005Conference paper (Refereed)
    Abstract [en]

    Privacy-enhanced Identity Management can enable users to retain and maintain informational self-determination in our networked society. This paper describes the usability research work that has been done within the first year of the European Union project on “Privacy and Identity Management for Europe” (PRIME). It primarily discusses and compares three alternative UI paradigms for privacy-enhanced Identity Management, and presents how important legal privacy principles derived from the European Union Directives have been mapped into suggestions of user interface solutions for PRIME. Besides, it discusses results and encountered problems from conducted usability tests on mock-ups implementing the different UI paradigms and proposes means for addressing those problems. The paper concludes with remarks on the characteristics of usability work for privacy-enhancing technologies.

  • 7.
    Pettersson, John Sören
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Nilsson, Jenny
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Early user-testing before programming improves software quality2009In: Proceedings of the Second International Workshop on the Interplay between Usability Evaluation and Software Development: I-USED'09 The Interplay between Usability Evaluation and Software Development / [ed] S. Abrahão, K. Hornbäk, E. L-C Law, J. Stage, 2009, p. 1-2, article id 10Conference paper (Refereed)
    Abstract [en]

    This position statement does not focus on usability although it presents data from a software up-date cycle where several usability- and user-centred methods were used. The important lesson learnt is that a better (more complete) specification before programming results in fewer errors in the code and that such a specification can be reached by user tests of interactive mockups.

  • 8.
    Pettersson, John Sören
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Nilsson, Jenny
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Effects of early user-testing on software quality - Experiences from a case study2011In: Information Systems Development: Asian Experiences / [ed] Song, W.W.; Xu, S.; Wan, C.; Zhong, Y.; Wojtkowski, W.; Wojtkowski, G.; Linger, H., New York: Springer , 2011, p. 499-510Conference paper (Refereed)
    Abstract [en]

    It is a well-established fact that the usability of a software package increases if it has been tested with users and usability flaws have been corrected. However, this presentation does not focus on usability issues but on the effects of early user-testing on software code quality determined as the number of errors discovered in function tests. In analysing the results of an extensive software update cycle, the authors found that functional requirements based on the results of early user-testing resulted in program code that had half the number of the errors (and less than one-fifth of the critical errors) found in code based solely on requirements emanating from users’ verbal opinions.

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