Trust-Building in Peer-to-Peer Carsharing: Design Case Study for Algorithm-Based Reputation Systems

Peer-to-peer sharing platforms become increasingly important in the platform economy. From an HCI-perspective, this development is of high interest, as those platforms mediate between different users. Such mediation entails dealing with various social issues, e.g., building trust between peers online without any physical presence. Peer ratings have proven to be an important mechanism in this regard. At the same time, scoring via car telematics become more common for risk assessment by car insurances. Since user ratings face crucial problems such as fake or biased ratings, we conducted a design case study to determine whether algorithm-based scoring has the potential to improve trust-building in P2P-carsharing. We started with 16 problem-centered interviews to examine how people understand algorithm-based scoring, we co-designed an app with scored profiles, and finally evaluated it with 12 participants. Our findings show that scoring systems can support trust-building in P2P-carsharing and give insights how they should be designed

Trust your guts: fostering embodied knowledge and sustainable practices through voice interaction

Despite various attempts to prevent food waste and motivate conscious food handling, household members find it difficult to correctly assess the edibility of food. With the rise of ambient voice assistants, we did a design case study to support households’ in situ decision-making process in collaboration with our voice agent prototype, Fischer Fritz. Therefore, we conducted 15 contextual inquiries to understand food practices at home. Furthermore, we interviewed six fish experts to inform the design of our voice agent on how to guide consumers and teach food literacy. Finally, we created a prototype and discussed with 15 consumers its impact and capability to convey embodied knowledge to the human that is engaged as sensor. Our design research goes beyond current Human-Food Interaction automation approaches by emphasizing the human-food relationship in technology design and demonstrating future complementary human-agent collaboration with the aim to increase humans’ competence to sense, think, and act

Empfehlen von Pfadabweichungen - ein praxisorientierter Ansatz für nachhaltigen Konsum

Western consumption patterns are strongly associated with environmental pollution and climate change, which challenges us with transforming our society and consumption towards a sustainable future. This thesis takes up this challenge and aims to contribute to this debate at the intersection of ICT artifacts and social practices through the examples of food and mobility consumption. The social practice lens is employed as an alternative to the predominant persuasive or motivational lens of design in the respective consumption domains. Against this background, this thesis first presents three research papers that contribute to a broader understanding of dynamic practices and their transformation towards a sustainable stable state. The following research takes up these sections' empirical results that more intensely focus on the appropriation of materials and infrastructures utilizing Recommender Systems. Given this approach, this thesis contributes to three fields - practice-based Computing, Recommender Systems, and Consumer Informatics.Westliche Konsummuster sind stark mit Umweltverschmutzung und Klimawandel verbunden, was uns vor die Herausforderung stellt, unsere Gesellschaft und unseren Konsum in Richtung einer nachhaltigen Zukunft zu transformieren. Die vorliegende Arbeit nimmt diese Herausforderung an und will einen Beitrag zu dieser Debatte an der Schnittstelle von IKT-Artefakten und sozialen Praktiken am Beispiel des Lebensmittel- und Mobilitätskonsums leisten. Die analytische Linse der sozialen Praxis wird als Alternative zum vorherrschenden persuasiven oder motivierenden Designansatz in den jeweiligen Konsumbereichen verwendet. Vor diesem Hintergrund werden in dieser Arbeit zunächst drei Forschungsarbeiten vorgestellt, die zu einem breiteren Verständnis dynamischer Praktiken und ihrer Transformation hin zu einem nachhaltig stabilen Zustand beitragen. Die folgenden Untersuchungen greifen die empirischen Ergebnisse dieses Abschnittes auf und fokussiert auf die Aneignung von Materialien und Infrastrukturen durch Empfehlungssysteme. Mit dieser Herangehensweise leistet diese Arbeit einen Beitrag zu den drei Feldern practice-based Computing, Empfehlungssysteme und Verbraucherinformatik

Recommending path deviations - a practice-based approach to sustainable consumption

Western consumption patterns are strongly associated with environmental pollution and climate change, which challenges us with transforming our society and consumption towards a sustainable future. This thesis takes up this challenge and aims to contribute to this debate at the intersection of ICT artifacts and social practices through the examples of food and mobility consumption. The social practice lens is employed as an alternative to the predominant persuasive or motivational lens of design in the respective consumption domains. Against this background, this thesis first presents three research papers that contribute to a broader understanding of dynamic practices and their transformation towards a sustainable stable state. The following research takes up these sections' empirical results that more intensely focus on the appropriation of materials and infrastructures utilizing Recommender Systems. Given this approach, this thesis contributes to three fields - practice-based Computing, Recommender Systems, and Consumer Informatics.Westliche Konsummuster sind stark mit Umweltverschmutzung und Klimawandel verbunden, was uns vor die Herausforderung stellt, unsere Gesellschaft und unseren Konsum in Richtung einer nachhaltigen Zukunft zu transformieren. Die vorliegende Arbeit nimmt diese Herausforderung an und will einen Beitrag zu dieser Debatte an der Schnittstelle von IKT-Artefakten und sozialen Praktiken am Beispiel des Lebensmittel- und Mobilitätskonsums leisten. Die analytische Linse der sozialen Praxis wird als Alternative zum vorherrschenden persuasiven oder motivierenden Designansatz in den jeweiligen Konsumbereichen verwendet. Vor diesem Hintergrund werden in dieser Arbeit zunächst drei Forschungsarbeiten vorgestellt, die zu einem breiteren Verständnis dynamischer Praktiken und ihrer Transformation hin zu einem nachhaltig stabilen Zustand beitragen. Die folgenden Untersuchungen greifen die empirischen Ergebnisse dieses Abschnittes auf und fokussiert auf die Aneignung von Materialien und Infrastrukturen durch Empfehlungssysteme. Mit dieser Herangehensweise leistet diese Arbeit einen Beitrag zu den drei Feldern practice-based Computing, Empfehlungssysteme und Verbraucherinformatik

Probing Integrated Household Information Systems for Integrated Food Practices

Recent publications propose concepts of systems that integrate the various services and data sources of everyday food practices. However, this research does not go beyond the conceptualization of such systems. Therefore, there is a deficit in understanding how to combine different services and data sources and which design challenges arise from building integrated Household Information Systems. In this paper, we probed the design of an Integrated Household Information System with 13 participants. The results point towards more personalization, automatization of storage administration and enabling flexible artifact ecologies. Our paper contributes to understanding the design and usage of Integrated Household Information Systems, as a new class of information systems for HCI research

Morning Routines between Calm and Engaging: Designing a Smart Mirror

Frequently the main purpose of domestic artifacts equipped with smart sensors is to hide technology, like previous examples of a Smart Mirror show. However, current Smart Homes often fail to provide meaningful IoT applications for all residents’ needs. To design beyond efficiency and productivity, we propose to realize the potential of the traditional artifact for calm and engaging experiences. Therefore, we followed a design case study approach with 22 participants in total. After an initial focus group, we conducted a diary study to examine home routines and developed a conceptual design. The evaluation of our mid-fidelity prototype shows, that we need to study carefully the practices of the residents to leverage the physical material of the artifact to fit the routines. Our Smart Mirror, enhanced by digital qualities, supports meaningful activities and makes the bathroom more appealing. Thereby, we discuss domestic technology design beyond automation

Data Science Canvas: Evaluation of a Tool to Manage Data Science Projects

Data emerged as a central success factor for companies to benefit from digitization. However, the skills in successfully creating value from data – especially at the management level – are not always profound. To address this problem, several canvas models have already been designed. Canvas models are usually created to write down an idea in a structured way to promote transparency and traceability. However, some existing data science canvas models mainly address developers and are thus unsuitable for decision-makers and communication within interdisciplinary teams. Based on a literature review, we identified influencing factors that are essential for the success of data science projects. With the information gained, the Data Science Canvas was developed in an expert workshop and finally evaluated by practitioners to find out whether such an instrument could support data-driven value creation

Mehrwerte digitaler Kassenbons: Der wertvolle Kunden:innen Touchpoint direkt am Point of Sale

Spätestens seit der Belegausgabepflicht in Deutschland ist der digitale Kassenbon in aller Munde. Neben der Reduzierung umweltschädlichen Thermopapiers ergeben sich mit dieser Technologie auch neue Schnittstellen zwischen Kunde:in und Handel. Diese können für eine stärkere Digitalisierung und ein gesteigertes Kund:innen-Erlebnis genutzt werden. Vor diesem Hintergrund betrachtet dieses Whitepaper die Perspektiven der verschiedenen Stakeholder, Architekturen sowie mögliche Mehrwertdienste zur Steigerung des Kund:innen-Erlebnis, aber auch zur Optimierung der Handelsprozesse

Going Car-free: Investigating Mobility Practice Transformations and the Role of ICT

With the debates on climate change and sustainability, a reduction of the share of cars in the modal split has become increasingly prevalent in both public and academic discourse. Besides some motivational approaches, there is a lack of ICT artifacts that successfully raise the ability of consumers to adopt sustainable mobility patterns. To further understand the requirements and the design of these artifacts within everyday mobility adopted a practice-lens. This lens is helpful to get a broader perspective on the use of ICT artifacts along consumers’ transformational journey towards sustainable mobility practices. Based on 12 retrospective interviews with car-free mobility consumers, we argue that artifacts should not be viewed as ’magic-bullet’ solutions but should accompany the complex transformation of practices in multifaceted ways. Moreover, we highlight in particular the difficulties of appropriating shared infrastructures and aligning own practices with them. This opens up a design space to provide more support for these kinds of material-interactions, to provide access to consumption infrastructures and make them usable, rather than leaving consumers alone with increased motivation