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  • 551.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    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.
    Graf, Cornelia
    Hochleitner, Christina
    Wolkerstorfer, Peter
    Angulo, Julio
    Towards Usable Privacy Enhancing Technologies: Lessons Learned from the PrimeLife Project2011Report (Other academic)
    Abstract [en]

    In this deliverable, we present lessons learnt from the PrimeLife HCI (Human Computer Interaction) Activity by discussing typical HCI challenges and fallacies that we experienced during the PrimeLife project. We also provide guidance on how these issues can be addressed in order to develop usable privacy-enhancing technology solutions.

  • 552.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Fischer Hübner, SimoneKarlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.Köffel, CWolkerstorfer, Peter
    HCI Research Report: Version 12009Collection (editor) (Other academic)
    Abstract [en]

    One of the core activities in the PrimeLife  project is the design and implementation of privacy aware applications that are usable. Therefore it is the main objective of Activity 4 to assure the usability of those applications and advance the research in this area. The First HCI Research Report presents the main research results of the HCI activity within the first year of PrimeLife. The HCI Research Report V1 presents work in progress and will be updated and complemented by a second version, the Final HCI Research Report (D4.1.5), which will be published at the end of the PrimeLife project.

  • 553.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    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.
    Wolkerstorfer, Peter
    Usability Challenges of Privacy Technologies2011Conference paper (Other (popular science, discussion, etc.))
  • 554.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    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.
    Zwingelberg, Harald
    UI prototypes: Policy administration and presentation (version 1)2009Report (Refereed)
    Abstract [en]

    Privacy Policies are an important prerequisite for user control in privacy-enhancing identity management. The transparency of privacy policies can be enhanced if users are informed about mismatches of a site’s policy with the user’s preferences. Investigating understandable and transparent privacy policies as well as simplified and usable privacy preference (data release policy) management "on the fly" are the objectives of the deliverable. For this, it is discussing icons presenting the content of policies and different User Interface (UI) prototypes for policy display and preference administration, which have been partly compared and tested in an Online user study. Finally, legal requirements for policy display in social network sites and how they translate to Human Computer Interaction (HCI) requirements are investigated.

  • 555.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    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.
    End User Transparency Tools: UI Prototypes2010Report (Refereed)
    Abstract [en]

    The Data Track is a user-side transparency-enhancing tool developed in PrimeLife, which provides the users with a history function documenting what personal data the user has revealed to whom under which conditions. Besides, it provides online functions to access the user’s personal data at the remote services side. This deliverable documents PrimeLife work package 4.2’s work on a usable Data Track. After introducing into the Data Track functionalities and the technical background, we will present the results of five iterations of user interface developments and usability testing, which we performed at Karlstad University and at CURE. We also present our initial work on a Data Track for social communities as well as on a Data Track for lifelong privacy.

  • 556.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    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.
    The Users' Mental Models' Effect on their Comprehension of Anonymous Credentials2011In: Privacy and Identity Management for Life / [ed] Camenisch, J.; Fischer-Hübner, S.; Rannenberg, K., Heidelberg: Springer , 2011, p. 233-244Chapter in book (Other academic)
    Abstract [en]

    Anonymous Credentials are a key technology for enforcing data minimisation for online applications. The design of easily understandable user interfaces for the use of anonymous credentials is however a major challenge, as end users are not yet familiar with this rather new and complex technology and no obvious real-world analogies exist for them. In this chapter, we analyse what effects the users’ mental models have on their understanding of the data minimization property of anonymous credentials in the context of an e-Shopping application scenario. In particular, we have investigated the effects of the mental models of a card-based user interface approach and an attribute-based user interface approach and compared these in terms of errors of omission and addition. The results show that the card-based approach leads to significantly more errors of addition (i.e., users believe that they have disclosed more information than they actually have) whereas the attribute-based approach leads to more errors of omission (i.e., users underestimate the amount of data that they have disclosed).

  • 557.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Graf, C
    Wolkerstorfer, P
    Hochleitner, C
    Tscheligi, M
    HCI for PrimLIfe Prototypes2011In: Primelife - Privacy and Identity Management for Life / [ed] J. Camenisch, S. Fischer-Hübner & K. Rannenberg, Heidelberg: Springer , 2011, p. 217-Chapter in book (Other academic)
  • 558.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Khandelwal, Nikunj
    Köffel, Christina
    Access Control in Social Networks2009Report (Refereed)
  • 559.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Norlander, Torsten
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Archer, Trevor
    Department of Psychology, University of Gothenburg.
    The effect of page layout on mental workload: A dual-task experiment2008In: Computers in human behavior, ISSN 0747-5632, E-ISSN 1873-7692, Vol. 24, no 3, p. 1229-1245Article in journal (Refereed)
    Abstract [en]

    In two dual-task experiments, the effects of page layout on mental workload were explored. Previous studies indicate that it is preferable to present a text document on paper than to display it on a computer screen (e.g. Mayes, D. K., Sims, V. K., & Koonce, J. M. (2001). Comprehension and workload differences for VDT and paper-based reading. International Journal of Industrial Ergonomics, 28(6), 367–378; Wastlund, E., Reinikka, H., Norlander, T., & Archer, T. (2005). Effects of VDT and paper presentation on consumption and production of information: Psychological and physiological factors. Computers in Human Behavior, 21, 377–394). However, critics have advocated improper matching of the materials between the two media as a confounding variable e.g. (Noyes, J. M., & Garland, K. J. (2003). VDT versus paper-based text: reply to Mayes, Sims and Koonce. International Journal of Industrial Ergonomics, 31(6), 411–423). The focus of the present study has been to take one such variable, page layout, and then isolate and replicate it onscreen in order to assess its affect on user performance. The results of the present experiments showed that optimizing the page layout for onscreen viewing decreased mental workload. This not only confirms the importance of matching all aspects of the presentational modes in doing paper vs. computer comparisons, but also shows that reading from a computer screen can be facilitated by creating documents with a page layout that is adapted to the screen which they are intended to be presented on.

  • 560.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Otterbring, Tobias
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Social and Psychological Studies.
    Gustafsson, Anders
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Heuristics and resource depletion: eye-tracking customers’ in situ gaze behavior in the field2014In: Journal of Business Research, ISSN 0148-2963, E-ISSN 1873-7978, no 1, p. 95-101Article in journal (Refereed)
    Abstract [en]

    When we visit a retail outlet, we go there to complete some type of shopping goal. These goals may be very specific and precisely planned prior to entering the store, or more abstract, and something we think of on the spur of the moment. The stores may display tens of thousands of different products, making it difficult to achieve the shopping goal in a rational manner. As a result, we use different types of heuristics to meet our shopping goals. In this study, we investigate how a customer’s visual attention is influenced by their shopping goal, based on the results of three field experiments in three different contexts—a gas station, a sports store, and a grocery store. Firstly we establish that differences do exist in viewing behavior based on whether shopping goals are planned or unplanned. A more complex and unplanned shopping goal leads to increased observations of in-store stimulus. We then study whether or not the complexity of the first shopping goal also influences the viewing behavior of the next shopping goal, independently of the characteristics of the second goal. The findings confirm that complex decision heuristics deplete cognitive recourse. This finding results in diminished visual attention during subsequent choices. In turn, this has implications for a customer’s shopping behavior.

  • 561.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Reinikka, Henrik
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Norlander, Torsten
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Archer, Trevor
    University of Gothenburg, Sweden.
    Effects of VDT and paper presentation on consumption and production of information: Psychological and physiological factors2005In: Computers in human behavior, ISSN 0747-5632, E-ISSN 1873-7692, Vol. 21, no 2, p. 377-394Article in journal (Refereed)
    Abstract [en]

    Two experiments were performed to investigate the influence of VDT (video display terminals) and paper presentation of text on consumption of information (Study 1) measured in the form of convergent production and production of information (Study 2) measured in form of divergent production. The READ test of reading comprehension was used as the convergent task whereas the “Headlines” test was used as the divergent task. Several other factors pertaining to performance were also studied including the PANAS test of positive and negative affect, the STH test of stress, tiredness and hunger, the TRI (Technology Readiness Inventory) and the SE test of stress and energy.

    The results show that performance in the VDT presentation condition where inferior to that of the Paper presentation condition for both consumption and production of information. Concomitantly, participants in the VDT presentation condition of the consumption of information study reported higher levels of experienced stress and tiredness whereas the participants in the VDT presentation condition of production of information study reported only slightly higher levels of stress.

    Although the results are discussed in both physiological and psychological terms arguments are made that the incremental effects of VDT text presentation stem mainly from dual-task effects of fulfilling the assignment and working with the computer resulting in a higher cognitive workload.

  • 562.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Löfgren, Martin
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Gustafsson, Anders
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration.
    Witell, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group.
    Consumer perception at the Point-of-Purchase: Evaluating proposed package designs in the eye-tracking lab2008Conference paper (Refereed)
  • 563.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Löfgren, Martin
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Witell, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Gustafsson, Anders
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration.
    Consumer Perception at Point of Purchase: Evaluating Proposed Package Designs in an Eye-tracking Lab2010In: Journal of Business & Retail Management Research, ISSN 1751-8202, Vol. 5, no 1, p. 41-50Article in journal (Refereed)
    Abstract [en]

    In today’s retail environment, consumer products are increasingly competing for customers’ attention. Research has shown that 60–80% of purchasing decisions are influenced in-store. Thus, packaging that stands out from competitors gains a competitive advantage. This study investigates the use of eye-tracking as a method to evaluate and design packaging with better Point-of-Purchase qualities. An eye-tracking laboratory was used and shoppers were recruited for three rounds of experiments. In total, 128 participants were recruited in order to assess the potential of eye-tracking. Results show that, when taking some methodological constraints into account, eye-tracking complements traditional methodologies with further insights when investigating the Point-of-Purchase qualities of packaging.

  • 564.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Löfgren, Martin
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Witell, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Gustafsson, Anders
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration.
    Consumer perception at the point-of-purchase2008Conference paper (Refereed)
  • 565.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration.
    Otterbring, Tobias
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Peripheral vision and the consumer choice process2015Conference paper (Refereed)
  • 566.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Sponseller, Kay
    Pettersson, Ola
    What You See is Where You Go: Testing a Gaze-Driven Power Wheelchair for Individuals with Severe Multiple Disabilities2010Conference paper (Refereed)
    Abstract

    Individuals with severe multiple disabilities have little or no opportunity to express their own wishes, make choices and move independently. Because of this, the objective of this work has been to develop a prototype for a gaze-driven device to maneuver powered wheelchairs or other moving platforms.



    The prototype has the same capabilities as a normal powered wheelchair, with two exceptions. Firstly, the prototype is controlled by eye movements instead of by a normal joystick. Secondly, the prototype is equipped with a sensor that stops all motion when the machine approaches an obstacle.



    The prototype has been evaluated in a preliminary clinical test with two users. Both users clearly communicated that they appreciated and had mastered the ability to control a powered

    wheelchair with their eye movements

  • 567.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Service Research Center.
    Witell, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration.
    Löfgren, Martin
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Shams, Poja
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Otterbring, Tobias
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Consumer choice processes and consideration sets2013Conference paper (Refereed)
    Abstract [en]

    With thousands and thousands of items to choose from in supermarkets, finding a product on the shelf can be a challenge. Naturally, consumers do not see all products nor do they consider buying all products they see. The consumer first screens the original set of products and then considers a reduced set of alternatives. The consideration set is evaluated and reduced to one alternative that is chosen (Lapersonne et al. 1995). The choice is actually a consumer choice process including several steps, e.g., orientation, evaluation, and verification (Russo and Leclerc, 1994).

    In the present study we investigated consumers’ consideration sets and consumer choice processes in an experiment with 52 respondents in a supermarket. The respondents were instructed to choose one package of sandwich meat that they would like to buy. The  experiment included two displays of shelves: The first shelf contained one section of sandwich meat and one section of products like pickled garlic and sun-dried tomatoes.The second shelf contained only sandwich meat but with two distinctly different types of packaging. Where the respondents looked first, if the chosen product were in that section, and how much they looked at areas outside their consideration set were investigated. The results show that in the shelf with two categories of products the participants hardly looked at the non-target products during the orientation phase or the verification phase. In the shelf with two differently packaged sandwich meats the participants looked at both parts of the shelf during the orientation phase but significantly more at their selfselected target area during the verification phase. These results highlight the importance of products signaling appropriate attributes in order to even be looked at.

  • 568.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Wolkerstorfer, Peter
    Austria.
    PET-USES2011In: Privacy and Identity Management for Life / [ed] Camenisch, Fischer-Hübner, Rannenberg, Heidelberg: Springer Berlin/Heidelberg, 2011Chapter in book (Other academic)
  • 569. Åsenlöf, Kent
    et al.
    Olsson, S.
    Norlander, Torsten
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology.
    Mening och välbefinnande: Samtalsterapi i kombination med flyt-REST och bildskapande2006Book (Refereed)
9101112 551 - 569 of 569
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