Human-Computer Interaction in the Digital Economy
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ItemDesign Guidelines for Creating a Convincing User Experience with Virtual In-vehicle Assistants( 2019-01-08)This research provides guidelines for the representational and interaction design of virtual in-vehicle assistants. The guidelines offer a clearly structured overview about what designers have to consider while creating in-vehicle virtual assistants with a convincing user experience. The design guidelines are developed using the design science research paradigm. Based on assistant requirements for a great user experience derived from the previous research literature and the results of five expert interviews, concrete guidelines for the design of in-vehicle virtual assistants are developed. For evaluation, the guidelines are presented to another expert and then refined based on her feedback.
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ItemInvestigating the User Experience of Smartphone Authentication Schemes - The Role of the Mobile Context( 2019-01-08)Today’s smartphones feature several authentication methods not only to protect the overall device but also to control access to mobile banking and commerce apps, for example. However, to date there is no clear understanding on how users perceive different authentication methods in light of different usage contexts. To close this gap, we report on a study (N=22) in which we compared four recent authentication schemes on Android devices (Face Unlock, fingerprint scanning, NFC ring and PIN) in four different mobile settings (private vs. public, moving vs. stationary). We found that Fingerprint scanning turned out to be a well-suited and accepted authentication scheme over all four investigated contexts. While the NFC-based ring authentication is seen as less suitable for private settings, Face Unlock is disliked for public settings.
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ItemTowards Understanding the Influence of Nature Imagery in User Interface Design: A Review of the Literature( 2019-01-08)Nature imagery is frequently employed as a design element to improve how users experience interactions with computerized artifacts such as websites and mobile apps. However, literature on the influence of such imagery on human perception and behavior is scant and highly fragmented. In this paper, we develop a theoretical framework that integrates the different pathways for how nature imagery embedded in user interface design may affect user perception and behavior. Building on this framework, we synthesize the results of existing literature on how humans perceive nature imagery and the potential cognitive, affective, and behavioral responses. By providing a concise overview of key theories and results of the extant literature, this study contributes to the knowledge base of (1) scholars who theorize on the impact of nature imagery on user perception and behavior and (2) systems designers who intend to utilize nature imagery in their user interfaces.
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ItemMapping Beyond the Uncanny Valley: A Delphi Study on Aiding Adoption of Realistic Digital Faces( 2019-01-08)Developers and HCI researchers have long strived to create digital agents that are more realistic. Voice-only versions are now common, but there has been a lack of visually realistic agents. A key barrier is the “Uncanny Valley”, referring to aversion being triggered if agents are not quite realistic. To gain understanding of the challenges of the Uncanny Valley in creating realistic agents, we conducted a Delphi study. For the Delphi panel, we recruited 13 leading international experts in the area of digital humans. They participated in three rounds of qualitative interviews. We aimed to transfer their knowledge from the entertainment industry to HCI researchers. Our findings include the unexpected conclusion that the panel considered the challenges of final rendering was not a key problem. Instead, modeling and rigging were highlighted, and a new dimension of interactivity was revealed as important. Our results provide a set of research directions for those engaged in HCI-oriented information systems using realistic digital humans.
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