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Auflistung nach Autor:in "Kern, Dagmar"

1 - 10 von 86
  • Konferenzbeitrag
    A Matter of Identity? Designing Personas for the Development of Makerspaces for Girls with Migration Background Considering Complex Social Identities
    (Mensch und Computer 2021 - Tagungsband, 2021) Pröbster, Monika; Marsden, Nicola
    Die vorliegende Studie befasst sich mit der Erstellung von Personas unter Berücksichtigung komplexer sozialer Identitäten im Rahmen einer Anforderungsanalyse für die partizipative Entwicklung von Makerspaces für Mädchen mit Migrationshintergund im Alter von 10-16 Jahren. Makerspaces bieten insbesondere Kindern und Jugendlichen eine anschauliche Zugangsmöglichkeit zu MINT-Themen. Jedoch erreichen diese Angebote Mädchen mit Migrationshintergrund bisher nur ungenügend. Mittels teilstrukturierter Interviews mit zehn Mädchen im Alter von 10-14 Jahren wurden Daten über die Zielgruppe erfasst und in einem mehrstufigen Prozess unter Berücksichtigung komplexer sozialer Identitäten vier Identitätsstrukturen identifiziert. Auf dieser Basis wurden vier Personas entwickelt. Der Prozess der Personaerstellung wird beispielhaft dargestellt und die weitere Verwendung der Personas im Kontext „MINT-Bildung/Makerspaces“ diskutiert.
  • Konferenzbeitrag
    Accelerating Deductive Coding of Qualitative Data: An Experimental Study on the Applicability of Crowdsourcing
    (Mensch und Computer 2021 - Tagungsband, 2021) Haug, Saskia; Rietz, Tim; Mädche, Alexander
    While qualitative research can produce a rich understanding of peoples’ mind, it requires an essential and strenuous data annotation process known as coding. Coding can be repetitive and timeconsuming, particularly for large datasets. Crowdsourcing provides flexible access toworkers all around theworld, however, researchers remain doubtful about its applicability for coding. In this study, we present an interactive coding system to support crowdsourced deductive coding of semi-structured qualitative data. Through an empirical evaluation on Amazon Mechanical Turk, we assess both the quality and the reliability of crowd-support for coding. Our results show that non-expert coders provide reliable results using our system. The crowd reached a substantial agreement of up to 91% with the coding provided by experts. Our results indicate that crowdsourced coding is an applicable strategy for accelerating a strenuous task. Additionally, we present implications of crowdsourcing to reduce biases in the interpretation of qualitative data.
  • Konferenzbeitrag
    An Accessible User Interface Concept for Non-Verbal and Spatial Aspects of Business Meetings for Blind and Visually Impaired People
    (Mensch und Computer 2021 - Tagungsband, 2021) Koutny, Reinhard
    Business meetings are an integral part ofwork life. While the modus operandi has changed over the course of the past years and decades, shifting from meetings with analog tools like flipcharts to digital aids like projectors or large touch displays mounted to walls, some aspects have stayed the same: Information does not only get exchanged verbally. Visual information like flipcharts but also non-verbal communication and spatial information are deemed essential information. This information is basically inaccessibly to blind and visually impaired people, which renders business meetings inaccessible to them as well. Consequentially, BVIPs have a tremendous disadvantage in their professional life. While research has been concerned with the mitigation of single aspects of the whole problem, especially with tracking all types of information, no comprehensive and user-friendly user interface approach has been developed. This paper proposes an accessible user interface approach facilitating affordable off-the-shelf hardware, which allows access to visual, non-verbal and spatial aspects of business meetings in a user-friendly manner and presents a fully functional prototype called MAPVI brainstorming tool.
  • Konferenzbeitrag
    Activity Support For Seniors Using Public Displays: A Proof Of Concept
    (Mensch und Computer 2021 - Tagungsband, 2021) Fietkau, Julian; Stojko, Laura
    Seniors face many challenges in their daily activities regarding mobility and accessibility. We have designed and prototyped a system of networked public displays to support them, particularly regarding outdoor pedestrian navigation. This article describes the process and results of a qualitative evaluation of this prototype system, which was conducted with seven participants, a mixture of older adults and experts on geriatric care. Based on insights gained from these interviews, we provide guidance on the design of outdoor activity support systems for seniors.
  • Konferenzbeitrag
    Age-Related Differences in Preferences for Using Voice Assistants
    (Mensch und Computer 2021 - Tagungsband, 2021) Gollasch, David; Weber, Gerhard
    In the past fewyears, voice assistants have become broadly available in different forms of presentation and devices – not only as a personal assistant within smartphones but as smart speakers, within TV sets or as part of an in-car infotainment system. Furthermore, we live in an ageing society and considering elderly people as users of voice assistants gains more relevance driven by both trends. The goal of this study is to identify the specific age-related preferences of older people when using a conversational user interface in form of a voice assistant. We conducted a survey based on 26 elderlyrelated communication strategies among participants of different age. The participants had to evaluate the strategies according to their own preferences for using voice assistants. As a result, we identified 11 preferences specific to older users. Surprisingly, most of the communication strategies, when applied to voice assistants, seem to be relevant for users of all ages, and a few of the communication strategies do not apply when used in voice assistants. The preferences specific to older people help to develop new guidelines for voice user interfaces or conversational user interfaces in general. They do not automatically lead to those guidelines but provide a foundation to derive requirements, develop guidelines and evaluate those guidelines by means of user-based usability tests.
  • Konferenzbeitrag
    AmI-VR: An Accessible Building Information System as Case Study Towards the Applicability of Ambient Intelligence in Virtual Reality
    (Mensch und Computer 2021 - Tagungsband, 2021) Götzelmann, Timo; Kreimeier, Julian; Schwabl, Johannes; Karg, Pascal; Oumard, Christina; Büttner, Florian
    Ambient intelligence represents a paradigm in which the user does not react to the environment, but vice versa. Accordingly, smart environments can react to the presence and activities of users and support them unobtrusively from the background. Especially in the context of accessibility, this offers great potential that has so far only been demonstrated for individual user groups. To overcome this limitation, we propose the automated, user- and context-related adaptation of the modality as well as locality of the representation of building information in the form of both an adjustable table as well as two displays on the basis of a prototype for a library information center. For being independent from material and regulatory restrictions and for better planability (especially with the ongoing COVID-19 pandemic) we used in addition to the hardware components also a Virtual Reality simulation, which proved to be very useful. Further optimization and evaluation will be needed for a more in depth understanding and dissemination in the long run, yet our prototype aims to help fostering further activities in the field of ambient intelligence, accessibility and virtual reality as a planning tool.
  • Konferenzbeitrag
    Analysis of Significant Factors Influencing the Technology Acceptance of Smartglasses in the Craft Sector
    (Mensch und Computer 2021 - Tagungsband, 2021) Bröning, Lukas; Herpers, Martine
    Smartglasses mit Augmented Reality Technologie erfreuen sich immer größerer Beliebtheit in der Arbeitswelt und finden zunehmend Verwendung als Arbeitsassistenzsysteme. In Deutschland sind die Geräte im Handwerk, insbesondere in kleinen und mittleren Unternehmen (KMU), noch nicht weit verbreitet, obwohl sie zentralen Herausforderungen wie Fachkräftemangel und kürzer werdenden Innovations- und Produktionszyklen entgegenwirken können. Um die Wahrnehmung von Smartglasses im Handwerk zu beleuchten, wird eine erste quantitative Analyse durchgeführt. Hierzu wird ein kontextspezifisches Forschungsmodell für die Sanitär-, Heizungsund Klimatechnik-(SHK-)Branche entwickelt, das die Akzeptanzfaktoren Performance Expectancy, Effort Expectancy, Social Influence, Compatibility, Perceived Risks und Perceived Substitutability umfasst. Auf Basis einer Online-Umfrage (N = 38) wird das entwickelte Modell evaluiert und eine deskriptive Analyse sowie Korrelationsanalyse zur Auswertung der Umfragedaten vorgenommen. Die Ergebnisse zeigen, dass die Nutzung von Smartglasses überwiegend Zustimmung durch die Beschäftigten erfährt und die Technik als nützlich, einfach bedienbar, risikofrei und mit der eigenen Arbeitsweise vereinbar wahrgenommen wird.
  • Konferenzbeitrag
    Auditing the Biases Enacted by YouTube for Political Topics in Germany
    (Mensch und Computer 2021 - Tagungsband, 2021) Heuer, Hendrik; Hoch, Hendrik; Breiter, Andreas; Theocharis, Yannis
    With YouTube’s growing importance as a news platform, its recommendation system came under increased scrutiny. Recognizing YouTube’s recommendation system as a broadcaster of media, we explore the applicability of laws that require broadcasters to give important political, ideological, and social groups adequate opportunity to express themselves in the broadcasted program of the service. We present audits as an important tool to enforce such laws and to ensure that a system operates in the public’s interest. To examine whether YouTube is enacting certain biases, we collected video recommendations about political topics by following chains of ten recommendations per video. Our findings suggest that YouTube’s recommendation system is enacting important biases. We find that YouTube is recommending increasingly popular but topically unrelated videos. The sadness evoked by the recommended videos decreases while the happiness increases.We discuss the strong popularity bias we identified and analyze the link between the popularity of content and emotions.We also discuss how audits empower researchers and civic hackers to monitor complex machine learning (ML)-based systems like YouTube’s recommendation system.
  • Konferenzbeitrag
    Augmented Reality Guidance for Car Repairs: immediate and long-term Effects
    (Mensch und Computer 2021 - Tagungsband, 2021) Hoffmann, Clemens; Prilla, Michael; Wundram, Kai; Emmermann, Björn
    Car service technicians are challenged by the increasing variety and complexity of repair and maintenance tasks. Recent studies have shown benefits by using augmented reality (AR) for different industrial tasks. Most studies compared a very established support technology with the new AR support in just one initial exposure. The lack of routine in dealing with AR often creates a respective disadvantage. This paper looks into the question to which extent can AR head-mounted display (AR HMD) guidance provide benefits for an unknown car repair task. To investigate further than an initial exposure, the service technicians repeated the specific task every twoweeks in total four times. The experiment under field conditions compares the efficiency, the repair quality, and the mental effort under AR HMD support to the traditional repair guideline. Results indicated that AR HMD support impacts positive the repair quality immediately and long term. Furthermore, the AR HMD support created a decent learning environment, that the high quality also remained without AR guidance. This shows opportunities to use AR HMDs for training and guidance of industrial tasks in practice.
  • Konferenzbeitrag
    Bridging the Communication Gap: A Driver-Passenger Video Link
    (Mensch & Computer 2009: Grenzenlos frei!?, 2009) Tai, Grace; Kern, Dagmar; Schmidt, Albrecht
    Driver-passenger interactions were identified in a recent large-scale naturalistic study as major source of driver distraction. According to this study, driver inattention to the forward road is often caused by conversations with passengers. This suggests that drivers may experience a visual communication gap when driving and conversing with passengers, which they then attempt to bridge by turning to look at the passengers. In an online survey of 132 participants presented in this paper, responses indicated that almost all drivers interact with passengers while driving. During these interactions, 77% of participants prefer to keep their eyes on the road, but at the same time, 88% of participants want eye contact with passengers. To address these conflicting preferences, a driving simulator user study with 16 participants was conducted to compare a simple monitor-based video system and a gaze-aware head-up display (HUD) video system. Results from this study indicated that a video system can provide drivers with greater visual contact with passengers without negatively impacting driving performance. Participants showed much greater interest in future use of a HUD-based system than a monitor-based system.