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Nilsson, Jenny
Publications (8 of 8) Show all publications
Pettersson, J. S. & Nilsson, J. (2011). Effects of early user-testing on software quality - Experiences from a case study. In: Song, W.W.; Xu, S.; Wan, C.; Zhong, Y.; Wojtkowski, W.; Wojtkowski, G.; Linger, H. (Ed.), Information Systems Development: Asian Experiences. Paper presented at The 18th International Conference on Information Systems Development ISD2009, September 16-19, Nanchang, China (pp. 499-510). New York: Springer
Open this publication in new window or tab >>Effects of early user-testing on software quality - Experiences from a case study
2011 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
New York: Springer, 2011
Keywords
Software quality, User-centered software development, Early user-testing, Ozlab, RIB
National Category
Information Systems
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-11109 (URN)9781441972057 (ISBN)
Conference
The 18th International Conference on Information Systems Development ISD2009, September 16-19, Nanchang, China
Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2018-03-13Bibliographically approved
Pettersson, J. S. & Nilsson, J. (2009). Early user-testing before programming improves software quality. In: S. Abrahão, K. Hornbäk, E. L-C Law, J. Stage (Ed.), 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. Paper presented at INTERACT 2009, Uppsala Sweden (pp. 1-2). , Article ID 10.
Open this publication in new window or tab >>Early user-testing before programming improves software quality
2009 (English)In: 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, Published 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.

Series
CEUR Workshop Proceedings, ISSN 1613-0073 ; 490
Keywords
Requirements specifications, Elicitation methods, Evolutionary prototyping, User interfaces, Human factors, Programming
National Category
Computer Systems Information Studies
Research subject
Information Systems; Computer Science
Identifiers
urn:nbn:se:kau:diva-66680 (URN)
Conference
INTERACT 2009, Uppsala Sweden
Available from: 2018-03-13 Created: 2018-03-13 Last updated: 2019-07-02Bibliographically approved
Fischer Hübner, S. & Nilsson, J. (2009). Trust and Assurance Control: UI prototypes.
Open this publication in new window or tab >>Trust and Assurance Control: UI prototypes
2009 (English)Report (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

Publisher
p. 48
Series
PrimeLife Project Deliverable ; D4.2.1
National Category
Information Systems Computer Sciences
Research subject
Information Systems; Computer Science
Identifiers
urn:nbn:se:kau:diva-9712 (URN)
Projects
PrimeLife
Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2018-06-04Bibliographically approved
Nilsson, J. & Siponen, J. (2006). Challenging the HCI Concept of Fidelity by Positioning Ozlab Prototypes. Karlstad: Springer-Verlag
Open this publication in new window or tab >>Challenging the HCI Concept of Fidelity by Positioning Ozlab Prototypes
2006 (English)Conference paper, Published 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

Place, publisher, year, edition, pages
Karlstad: Springer-Verlag, 2006
Keywords
Prototyping, prototypes, prototype fidelity, Wizard of Oz, Ozlab
National Category
Information Systems
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-17615 (URN)9780387308340 (ISBN)
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2018-01-11
Nilsson, J. (2005). Interaktionsdesign av pedagogisk programvara: En experimentell studie av demonstrationer som hjälpfunktioner i ett övningsprogram för mellanstadiebarn.
Open this publication in new window or tab >>Interaktionsdesign av pedagogisk programvara: En experimentell studie av demonstrationer som hjälpfunktioner i ett övningsprogram för mellanstadiebarn
2005 (Swedish)Report (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.

Series
Avdelningen för Informatik, Karlstads universitet
National Category
Information Systems
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-20473 (URN)
Note

Distrubution: jenny.nilsson@kau.se

Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2018-01-11
Pettersson, J. S., Fischer Hübner, S., Danielsson, N., Nilsson, J., Bergmann, M., Clauss, S., . . . Krasemann, H. (2005). Making PRIME Usable. In: Proceedings of the 2005 symposium on Usable privacy and security: . Paper presented at SOUPS 2005, Proceedings of the Symposium On Usable Privacy and Security 2005, July 6-8, Carneige Mellon University, Pittsburg. ACM Digital Library
Open this publication in new window or tab >>Making PRIME Usable
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2005 (English)In: Proceedings of the 2005 symposium on Usable privacy and security, ACM Digital Library, 2005Conference paper, Published 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.

Place, publisher, year, edition, pages
ACM Digital Library, 2005
National Category
Information Systems Computer Sciences
Research subject
Information Systems; Computer Science
Identifiers
urn:nbn:se:kau:diva-21226 (URN)10.1145/1073001.1073007 (DOI)
Conference
SOUPS 2005, Proceedings of the Symposium On Usable Privacy and Security 2005, July 6-8, Carneige Mellon University, Pittsburg
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2019-04-25Bibliographically approved
Nilsson, J. (2004). Det användarcentrerade projektet.
Open this publication in new window or tab >>Det användarcentrerade projektet
2004 (Swedish)Report (Other academic)
National Category
Information Systems
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-18197 (URN)
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2018-01-11
Aronsson, H. & Nilsson, J. (2003). Från Oz-prototyp till programmerad prototyp: fallstudie "Räkna med matte". Karlstad
Open this publication in new window or tab >>Från Oz-prototyp till programmerad prototyp: fallstudie "Räkna med matte"
2003 (Swedish)Report (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.

Place, publisher, year, edition, pages
Karlstad: , 2003
Series
Examensarbete i informatik
National Category
Information Systems
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-19547 (URN)
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2018-01-11
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